I priced it once, I don't remember the specifics, but it was way out there.
Check this link http://www.fibreglast.com/
Joe
From: SIMON WALKDEN <mrsym0r@gmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] carbon fibre
Date: Sun, 30 Oct 2005 10:33:53 +1300
I'm sure this question has been asked before, but why hasn't anybody made a pressure hull out of carbon fibre? Apparently it's 5 times as strong as steel, and good for reinforcing aluminium. Sounds like a logical, light-weight, low-cost alternative
-Simon