Bottom rail fit on 1500D door in 28" shower stall...

You need to provide more detailed info on your shower door.
Sliding or swing out. Bottom rail on the door or bottom rail on the shower stall curb. A few photographs would also help.

Hi

You did not mention any additional information about your problem except replacing shower door.However use basic hand tools to complete the job.

Try this following general steps :-
1. Remove the doors by lifting up on one door at a time and then pulling each out. The top of the door has rollers attached to it, and the rollers rest on the inside of the top rail of the frame. Set the doors aside.
2. With your drill, remove the two screws on each end of the top rail, located on the inside of the shower frame. Then lift off the top rail of the shower frame.
3. Use your box knife to cut the caulk on the side and bottom rails of the shower frame. Shower frames are caulked on the outside where they meet with the walls and floor of the shower.
4. Use your drill to remove the screws from the side rails. There will be two screws on each rail, securing it to the shower stall. Then, take the rails out. Remove the screws from the bottom rail and take it out.
5. Use your tape measure to measure the old side rails, top rail and bottom rail. With a pencil, mark the lengths on each new rail. Use your hacksaw to cut each rail. Hold a side rail in the exact location where the old rail was located. With your pencil, mark the screw holes on the shower wall. The new shower frame screw holes may not line up with the old shower frame screw holes. Use your drill and 3/16-inch drill bit to drill new holes if necessary. If the shower walls are ceramic, use the concrete drill bit. If the shower walls are fiberglass, use the multipurpose 3/16-inch drill bit.
6. Insert the 3/16-inch anchors into the holes that you drilled. Put the side rail into position and insert the screws into the holes. Use your drill and Phillips head drill bit to tighten the screws. Place the bottom rail into position and mark the holes. Drill new holes if necessary and install the anchors. Insert only one screw at the end where you installed the first side rail. Lift up the loose end of the bottom rail and slide the second side rail into place. Mark the holes. Remove the side rail and drill the new holes using the 3/16-inch drill bit. Insert the anchors and put the side rail back into place. Insert the screws and tighten with your drill using the Phillips head drill bit.
7. Set the top rail directly onto the side rails. In each end of the top rail, insert the two self-drilling screws until the top is secured to the sides. Insert the tube of clear caulk into the caulking gun. Cut the end off of the tube with your box knife. Caulk the side rails and the bottom rail to the shower walls on the outside of the shower. Re-hang the shower doors by lifting each door and placing the rollers on the inside of the top rail.
Also giving you some links from where you can find a detailed information regarding replacing shower doors.
http://www.diynetwork.com/how-to/how-to-replace-a-shower-door/index.html
http://www.thisoldhouse.com/toh/how-to/intro/0,,214441,00.html
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Please do get back to us for further query.

Ace Hardware sells that door and you will need to see if they can order the parts but it looka like they sell the doors 36" size so when you order you will need to order for the Sterling Plumbing 1500D-36S "Vista Pivot" Shower Door Fits Openings 31 -1/4" To 36" H 66" . Now if you have not completely finished the shower you could always make the door opening fit what you have.

I have the same issue how do you replace it without removing the entire frame

I have the same problem. I'm doing research today, I'll keep you posted. unless you already figured out where to get the seal, please let me know.

sterling is an inexpensive kohler product,....go to a plumbing supply store with your #s and they'll be able to get what you need.

not sure what you mean when inside door "swings" on a "sliding" door,...i'll assume you need the "inside door guide", a little plastic piece that screws with one screw to the main threshold,.....

are you sure your measurements are correct? hate to be looking like i'm playing devils advocate for sterling, but i've installed many shower doors and had made this mistake once,.....write me and maybe i can help rectify this potential goof,......

Sterling has a video on their website that explained what I needed.

instructions for shower door installations are very important to have,..i have installed over 100 of them and i still wouldn't attempt one without instructions,.your totally best to do the research it takes to get the instructions needed for this job,...there are certain cuts and measurements that are very dependent on specifications given by manufacturer to be right,....one wrong cut domino effects the whole job,....good luck