Can't help you there......you should be able to order it online however. I think most of the carpet labeled "indoor/outdoor" would be similar to the stuff I'm using. The difference would be the adhesive.
For use inside the car, any sort of thin carpet should work ok. The self-stick ability of the stuff I used, made the job relatively easy. But any carpet would be much better than nothing.
I'll keep my guns, my freedom, and my money.....you can keep the "change".