1995 Four Winns Fling I need some help with interior replacement...

[Huntleybill]

All the seats/cushions are faded, stained and some are starting to separate at the seems. I'd like to replace the material. Are there replacement materials for a boat this old? If so, who would you recommend getting them from. I did a google search and didn't find much for replacement material. I know I can go to an upholstery place, but if I can just buy the replacement covers, I can put them on myself.

Any help would be appreciated.
Thank you