I have a 2000 24' Fisher Pontoon and I use it on Alum Creek Lake in Ohio. I'm embarrassed to say that I lost my ladder. Its at the bottom of the lake. It was a folding 4 step ladder and I can't find any replacements. It has a 12" diameter from the center of the holes. Fisher boats (Rinker) don't make them anymore and no one has an exact 12" diameter ladder and I really don't want to drill more holes in my boat for a new ladder. Any suggestions?