Have you tried google-ing auto upholstry supplies? Looked in paper or on-line Hemmings Motor News for same? You might call National Fabric Supply in Kansas City............ National Fabric CO Incorporated (913) 281-1833 901 S 7th St, Kansas City, KS 66105 Cross Streets: Between Cheyenne Ave and Miami Ave Some more in Kansas City..........click on link http://www.yellowpages.com/kansas-city-ks/upholstery-supplies
Mac,s auto, Kanter . Your local upholstery shop can get it. It is not cheap anymore, but available. With the premade kind it s cloth will let it curve smoother than cut and sewn out of other materials. Jack