Hi John,
Here's what you can do:
about 1 foot off the short end of your pool, in a straight line side to side, mount 2 4x4 posts to which you can then mount a Feherguard solar reel - they should be plenty good enough for a 15 foot wide pool, or you can weld a reel up and mount it on the posts. I have a custom reel made by a local, it's primarily 4" Aluminum tube.
All you'd need to do is to get a couple of mounts made up for on top of the posts, each with a bearing chase in it, get some aluminum tube as the reel, fasten end caps to it onto which you weld steel rod to feed through the bearing in the chase. On the outside put a crank handle on each end.