I need to replace an old tub/shower pan which is very small – about 26×52 – in a floating home. I’ve checked with local home improvement centers as well as bath designers, but no one knows where I can find such a small shower pan. I don’t want to replace it with tile, since this is already a very damp environment. I called a few places which make shower surrounds out of cultured marble, but they are unable to supply an irregular size shower pan. Any suggestions?