My Sinbad came with navy blue vinyl cushion covers. They were in 6 pieces. The cabin benches were divided into 2 x 7ft lengths and the forecabin was one gigantic triangle with a little square bit to take out to use the loo. We split the big ones in half using vinyl from our local market so you didn't have to take the boat to bits to get to the lockers!
I doubt that there are any of the original arrangements left by now and there are plenty of firms around that will make up cushions to any shape or colour you want.
Geoff Harwood ex S/287 Zalophus