I have read that you need a hi heat resistant glue for this, seems the normal spray on adhesive will let go in time due to the heat. I was going to buy a volare wagon that wasn`t rusted up, but didn`t have a headliner (cardboard). I was going to clean it and use black speaker box material , it is very lite > I have used it extensively on my 68 fastback build.Yes they make plastic reproduction ones. I have one already in another dart I own. Not real impressed with it so I am going a different route this time.