I have a 24' round pool bottom rail is badley rusted where can I buy a replacement rail?

Most botton rails are are pretty much the same. Take a piece of yours to an above ground pool dealer and see if he can come close.

Thanks was wondering because when I went to http://mail.swimnplay.com/xcart/product.php?productid=189&cat=0&bestsellere
it says they use the same part for 21 ft & 24 ft. pools only difference is 14 on pieces on a 21 ft round & 16 for a 24 ft round , I checked their part # & they are the same . My husband said he thought the radius would be different for each pool size but site selling rails says same rail different quanity used.? Thanks