Every once in a while I see a '68 mustang advertised on ebay as having "leather seats". When I look at the pics it always looks to me like the upholstery is vinyl. Was leather upholstery an option on '68 stangs? Even if it wasn't does anyone know if someone makes aftermarket leather seat upholstery for '68 stangs that match the original pattern? Does anyone have leather upholstery in their car?