The seat frames are the same, so you can technically convert over to sport seats with this foam, and the appropriate upholstery. This does create a new issue to contend with. Your rear seat would not work with the sport seat style upholstery, so you would need to source a rear seat from a GT/Cobra for that to work correctly.
On upholstery options for your year model, cloth is not available. Leather and vinyl are the only options currently.