Check with Darby at Jacob's Upholstery in Spokane. They mostly do auto and furniture upholstering, but they also know aircraft fabric b/c, if I remember correctly, they do/did the upholstery in the Malibu jet prop conversions at Felts Field. They also have the coatings that can transform auto upholstery into burn-tested aircraft upholstery and can provide the burn certificates for it. This gives a lot more options in terms of fabric selection. They covered my Van's cushions for me.
