Re: Boat Cushion Question
The chances are slim that you'll find new replacements.
We bought heavy-duty marine vinyl and used the originals for templates to cut the new. I found the plywood on two of the seat to be pretty rotted, so I used the old as templates to cut new. The foam was in good shape so we reused it.
We took the new cut pieces of vinyl and the original to a local upholsterer who charged us (are you ready for this?) $25 to sew the new pieces together for three new seat bottoms and a bench seat! It literally took him ten minutes and he did it while we waited.
Use stainless steel staples to put the new vinyl on.