Ken,
Summit makes the stuff for you.. I think its the same thing you mentioned... the aluminum coated fiberglass... I bet that would work best because then you can double wrap it for extra heatproofiness (yes i make-up my own words) If you lay it right and hit it up with those really big clamps that are similar to the hlf shaft clamps it could look really good too!
------------------
~In Memory Of Jesse Cesek~ 1980-2000
1985 GT ~Purple, Black and Yellow Interior(Fastback Converted)
1997 Mitsu Eclipse GSX (AWD, Turbo) DOA on 12/10/2000