I'm looking forward to make a minor mod on my 23ws. However, I need to find the same material used to make the cushions in my hybrid. Has anyone ever asked that question or got an answer !
The only suggestion would be to check with the factory. Maybe they will tell you who makes the cushions for them, or there could be a tag on the cushion with the manufacturer listed. Mine has snow and a cover on it so a little hard to get into now to check.