Just get some good old vinyl tape, it will be your best friend. It's clear. I hate to say but walmart has it in there RV section. Make sure you clean the vinyl real good with soap and water or vinyl cleaner. Get all the old duck tape off. Use a good sharp pair of scissors or a razor blade to cut the vinyl tape and apply it a few inches over the damaged area. Press it on real good and you should be all set. I doubt you will need to replace it but a real good source for replacing vinyl for a pop up is these guys. http://www.bearcreekcanvas.com/ Since your at it you may want to clean the outs