If you have the preset cushions, they can be used as a pattern to make new (and even better ones) than OEM by a local Marine Canvas Shop, or Automotive Interior shop with the machines that can handle the vinyl.
You can also upgrade the foam density over what most shops use when having semi to full custom sets made.
I would also pull a search here (top right of the Site) on the word “ Cushions“ as well as listen in on the 1st part of the Podcast with Kevin from East Cape and myself when we discuss Skiff interior cushion options for other possible options and ideas.
Hope this helps!
Dave