For anyone else with this pool (USA Industries type) I did take a section of my top rail to the pool store, they said it was like alot like the top of inground type pools. They did say it looked like a standard beaded liner would fit and we tried several pieces from new liner samples, all the beaded liner samples they had were pretty much alike and they said they were just standard beaded liners. They did catch in the bead groove and seemed to hold fine. I ordered a 'standard 24 x 48 beaded above ground liner'. When it came in I also bought a roll of 'bead lock' just as a little insurance to hold it. When I started to install the liner all was going great, hooking and holding fine. The 'bead lock' strip would not fit in, there just wasn't enough room left in the groove for it. When I got to about 3/4 of the liner bead install and started pulling and stretching the liner would come loose at most of the 'corners' . It just wouldn't stay in. I tried the bead lock roll again but no luck. What I did was make my own bead lock out of some thin plastic from wood paneling connectors. I cut strips of this plastic which is about a 1/16th of an inch thick into about 1/4 inch wide strips. I wedged this in above the bead in the groove all the way around. I fit really tight and snug and holds the liner in perfect and the 'corners' are good. Sorry for the long post but for anyone else wanting to know, there is a way to use a standard beaded liner rather than pay them $750 up to $1500 for their 'special liner'.