Kathylu I have used PCPOOLS dot com for many items including a liner just like the one you need...mine also was DIY built to the same spec's...i got a season closout deal for the liner and shipping @ $214.00. and it fits like a glove..ck them out. if your pnls are rusting but still usable you can clean them off with a 3m scotch bright pad then prim with some spray can paint. i used 3m spray adheasive and 1/8" floor foam padding (the foam that goes under hardwood floors) glued to the walls which help protect the vinyl from abrasions..