vinyl repair
The cement that Stan posted will work when you get the material. If you can't find it, VLP vinyl repair glue will work also. You should be able to do a google search to find it. I found some at a Tap Plastics here.
One of the things that you should do every time that you close the camper is to tuck in the corners, even if they look like they are not sticking out. The way the vinyl folds in, it tends to rub on the side near the corners if you do not tuck it in and in turn will start to wear. Any small holes that do develop this way can be patched though.
If you need any material, just give me a call. We have the grey material and also a lot of the older orange looking material now. We changed out an old liner the other day and I saved all the material that I could from it so that we would have some to send out to you folks with the older FWC campers.