Hi there...new to the forum but had a pool all my life. My Pop built this pool himself in 1964(I take care of it now...he's 82). It originally had marine plywood walls, an overlap liner and vinyl covered wood coping. My parents replaced the liner once and in 1994 the walls finally gave way (30 yrs not bad I'd say). The pool was replaced with a new sand bottom, steel wall and a beaded vinyl liner in 1994. That liner finally gave way this winter We need a DYI solution. I have people to help me to install a new liner but I have no idea of the pool brand. The receipt does mention universal coping and I can see it has a regular bead liner channel. I looked online and the only ready- made liners in our size (12'x20'x48") are for Kayak and Fantasea "onground" pools. Are the beads different for an "onground" pool. Do I need to order a "custom" liniing...the forms are very confusing because this pool is simple..constant depth at 4', 90degree corners and a rectangle (no cotouts,no steps) . Thanks in advance Kath