Targus Digital TG6660TR 66Inch Tripod with 3Way Panhead operators manual

take a sample along to a rubber retailer as they have a selection of rubbers that may do the job

There are two issues I'd like to help resolve here.
They are 'binding while I'm panning' and 'binding when I start to pan'.

Binding while I'm panning...
There is a large knob on the side of the panhead that needs to be loosened slightly. I have seen some folks loosen the panning handle because they believe it to release the panning mechanism.
Also, be sure that the camera you are using is not too heavy. There's a 5lb (2.2kg) limit and that can also cause undue strain.

Binding when I start to pan...
When panning, I advise our students to begin their pan a couple of feet ahead of the actual scene they'd like to pan and finish a couple of feet after the scene. This allows for a smooth pan after you overcome the inertia in getting the pan head to move and doesn't result in a jerky stop. It's straightforward to edit out these lead in and lead out sections.

Hope this helps.

The handle probably operates the pan and tilt operations, and the head rotates through 90 degrees for vertical shots. The QR plate screws into the tripod socket on the base of the camera, then clips to the tripod head.

Try this site for more info and sizes of quick releases: http://www.tripodquickrelease.com/Generic_Tripods.htm

Unfortunately, Vanguard does not sell replacement pieces, you may have to ship it off to them in order to get it fixed. It's either that or you can buy a new pan head or quick release adapter. You can find those at www.tripodquickrelease.com, sometimes though pan heads don't come off of a tripod.

No, but you can find some here at www.tripodquickrelease.com.

Call us at 800 735-4373 regarding service on Giottos tripods. The legs are not repairable by the owner and probably not by us. Or you can send it to us at. HP Marketing Corp. PO Box 715 16 Chapin Rd. Unit 908 Pine Brook, NJ 07058 800-735-4373

Where can I buy a quick release plate for my Targus tripod TG-50TR

Try http://www.tripodquickrelease.com/Generic_Tripods.htm for that part. There is listed the widest selection of quick releases and support more brands than any other web site I’ve seen.

I think this one from Adorama might work.

http://www.adorama.com/GTTQRP.html