I went to our local whole sale store and saw a few things that I could maybe use as substrate. I'm using repti carpet now and I hate it. I want something I can just use a paper to spray and wipe clean easily. I saw three things that I could possibly use.
Personally I like to limit the amount of artificial products used - can't be certain what is in them and how it reacts when heated. Remeber your lizard will be in close proximity to them and any fumes they give off. Same goes for adhesives.
That hardened rubber I doubt will be easy to clean.