[tcj103]

Yes, I should have mentioned that I was looking for the core material; the carbon-fiber goes on the outside, with a lightweight core on the inside. I'm looking for the core material. Aircraft use this stuff, and we could go out and buy this stuff for $100 or so a sheet; I'm looking for bargain prices, things like home insulation material, or other stuff that's cheap.

Steel would not be a good core, unless it was honeycomb material, so it would be light. But I think that stuff is pretty expensive.