Hi all, Looking to buy a winter cover for our heater (Hayward H150FDN). I can't seem to find one specifically made for this heater's dimentions, and wondering if most people just use a generic sized one? Also, they seem rather pricey ($60. and up), which is strange as central AC covers can be purchased for $15 and up. Seems like a lot just for an opening for the plumbing! Any suggestions on what others do / have found? Thanks!