Our 18" x 52" Intex Ultra Frame pool needs a new liner. Intex sells this liner only for 2015 pools and newer. The only other option I see online is an overlap liner, but I'm not eager to go that route. I'd prefer a liner like the original, where the metal top rails slip inside the liner. Has anyone found such a replacement? Suggestions on where to look for one? Also, if you've used the overlap liner, feel free to comment about that. Maybe you can change my mind about them. Thanks!