Has anyone used these seat kits from AA? I was going to purchase spare vinyl in the form of a backpad for my upholsterer to use, but with AA saying they use original material and the sewing is already done this seems the way to go (where I would install them). I need brown. I see 914 rubber sells the bolster kits too, but in black only. I realize the seat centers are going to be lighter from time compared to the new material.