Great find! The description of there material is very similar to the gasket material I used on my truck collectors and exhaust manifold at the head for the 200. The material I used was designed for Boilers with a stainless steal mesh center. This material never failed even with a deformed head and manifold surfaces of the 200. The problem was I had to cut this material to shape myself. Now that I am out, I have not been able to find a replacement, until now.
Thanks for the info; I will definitely be giving this a try.