Outrageous pricing for sure...I'm going to be restoring mine as well within the next few weeks or so
I went the sailrite route after comparing it to many other products...couldn't really find much competitiion with a 50mil thickness, ...I also liked how it came on a roll as opposed to being folded (I read reviews from similar products and short length-orders would come folded

) . I only needed 2 yards, and it still came nicely wrapped around a roll
This is the fabric I'm trying - shipping was quick!
My panels were also cracked so I'll be replacing those as well... I priced out a 3/8"x4x8 sheet of pvc (@Lowes=$98

), due to the length of my panels, I need an 8' foot length, ....decided to go with
this instead for $23...has the thickness and length I need at a fraction of the cost, pvc/water-proof...it's worth a shot, and there's 3 in the package, so I can afford a mistake...
I already stripped my old ones, probably the worst part...removing all those small staples...tedious, but not hard. I'm going to use my old panels as a template, trace and cut. Like Pete said, which I think is very important for a first-timer like me, when I removed the former fabric, I was careful to keep it as much intact as possible. This will help with templating the replacement as well as how to fold where/when necessary to minimize build up or wrinkles at the corners. I also watched some DIY vids, which seem helpful...heat-gun to soften fabric at corners etc... I'm actually looking forward to this project.
Joe Rut has a nice example