Long story short, I have two video cards that by virtue of the slot layout and other cards also in the system, they are forced to touch each other along their lengths. This means they kind of heat each other up, etc. I'm looking for suggestions on some kind of "card" I can slide between them that won't melt but won't really conduct heat either. This won't really block their fans because the fans pull air from the end of the card, not the side. I also have fans directly blowing on them from their top (side of case) but I'd still like a little more seperation. Any ideas for a type of material?