Do you think a 00' miata front lower control arm would fit on a 94' miata?

Hard to find parts for a Damante, I'd call around junk yards for the control arms. You can probably find an aftermarket replacement for the struts at a parts store. Take them with you so you can find a reasonable facsimile.

Two options. Whichever is easiest for you. Option 1) Call any auto parts store and ask them what any part fits. Example: What other years does a '95 Ford F-150 starter fit? (They'll ask the size of the engine)
or 2) Go to e-bay and look up the part you have. People who sell that part will tell you on e-bay all of the applications of that part.

The bar would be the sway bar.

The parts that connect the sway bar to the lower control arm are called the sway bar links.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

you can buy the complete control arms for $650. Chances are very good that your bushings are worn as well. Using a complete control arm replacement tightens up the front end.

http://www.autopartswarehouse.com/search/?searchType=global&N=0&Ntt=control+arm

It is unlikely to be the springs but more likely to be the ancillary suspension components such as the shock absorbers (suspension dampers) and either tired or worn rubber bushings on the the anti-roll (anti-sway) bar and control arms. Some cars are fitted with a steering damper arm and if this loses its damping effectiveness the steering will shimmy about. Bounce on each corner of the front of the car. The body should rebound and come to rest within one and half cycles. If the car continues to bounce the shocks need replacing. Lift the front of the car and remove the front wheels. Inspect the rubber bushings of control arms and shock absorber mounts for wear and annular cracks. Use a pry bar to apply force in order to detect for undue play in linkages and control arms. Check for play in the steering control arms ball joints and in the steering rack itself, including the mounting bolts. Everything should be tight and firm. Anything obviously loose and/or worn should be replaced.

The front suspension on this car should have struts, which means it will have two ball joints, one on each side. They are in the lower control arm, they connect the front bearing spindle to the lower control arm. They can be difficult to replace, some are bolted and some are press fitted. Any reputable front end alignment shop can replace these, but the cost for doing the job will be more expensive for the press fit ball joints. Hope this helps, let me know.

is it a macpherson type ,or is it just a shock absorber that fits inbetween the upper and lower track control arm

shouldnt be too hard mate, gather the boys over for the weekend because it`ll seriously take only 2 hours MAX to do.

Jack the kent up and take the wheels off...couple bolts here and there and bobs ya mum.

try to releive pressure by having it on stand also try another bolt from otherside or if you can get a vice grip on the shaft without stripping the threads and hit it with a hammer also wiggle control arm up and down while you do this

part of lower arm assembly only.

Installation

1. Inspect lower ball joint boots and seals for damage and replace if required. Lower ball joint and seal is part of front suspension lower arm and must be replaced as an assembly.
   

1. NOTE: Do not tighten the front suspension lower arm bolts and nuts to the specified torque until the end of assembly. Install nuts and tighten until snug.
   
   Position the front suspension lower arm in the front crossmember. Install the bolts. Install the nuts and tighten until snug.
   

1. Install torsion bar. Refer to Torsion Bar in this section.
   

1. Raise the front suspension lower arm to allow installation of front suspension lower arm ball joint into spindle bore.
   

1. Lower front suspension lower arm with a jack while making sure lower ball joint is seated in spindle bore. Install the lower ball joint attaching nut and tighten to 113-153 Nm (82-113 lb-ft). Install a new cotter pin.
   

1. Raise vehicle. Position the front shock absorber and install the nut/washer/bushing assembly. Tighten nut to 40-55 Nm (30-40 lb-ft).
   

1. Install the two nuts attaching the front shock absorber to the lower control arm and tighten to 21-29 Nm (15-21 lb-ft).
   

1. NOTE: Front suspension lower arms must be in the horizontal or curb position (vehicle on the ground) when tightening the front stabilizer bar link bolts. Use jackstands to raise the front suspension lower arms to the horizontal position or lower the vehicle to the ground (curb position).
   
   Lower the vehicle to the ground.
   

1. Connect the stabilizer bar link bolt to the front suspension lower arm and tighten to 13-17 Nm (10-13 lb-ft).
   

1. Tighten nuts and front suspension lower arm bolts to the No. 1 crossmember to 150-200 Nm (111-148 lb-ft).
   

1. Check ride height and align as necessary. Refer to Section 04-00 .
   

1. Lower the vehicle.