Look at C-Cushions in Rockport. They make very nice closed cell foam cushions, not cheap but very good and you'll never replace cushions again. I had them on a sailboat years ago and they were really nice.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner