Dallas -
I bought a big roll of some kind of insulation years ago that I used on my roadster and I really like it. I have plenty of it left to line the whole GTM. It could be EZ Cool, I can't remember. It is the stuff on top in this picture, so I think it's EZ Cool... But the core material is like a fine green bubble wrap just like in this picture, but the EZ Cool product page says it's a foam core? Maybe they've changed it?