You can look at Lowes or home Depot. They have an insulation matt that is like the expensive matt every one is selling. Just have to use a glue to put it down with. A friend told me about it and will probably use it after all the bed liner is put on the floor pan and fire wall. I just worry about it being to thick and could through the height of the carpet off some. He just used it in a supper bee. His buddy put it into the 68 charger he finished. So he say's it is about a quarter inch thick. Check it out. Of course my car is not that far along yet to be worrying about it yet. Russ.