Father-Son 1974 Duster Project

I would just get the aftermarket replacement from classic industries unless you can get some thick (1/4) plastic or plywood and shape it. Problem with wood or plastic in that area is the heat warps it. Cardboard seems to be a bit more forgiving. It warps too, but can get back into its old shape. Once the others warp from heat, they keep the form. I bought one and covered it.