You could try Maclean Composites. Not sure if it will suit but worth a look. http://www.macqc.com/items.php
They the following in stock:
Part# 45285 3.0-70-FABR ID(in.) - 3 OD(in.) - 3.125
Wall(in.) - 0.062
Weight(lbs./ft) - 0.4
Length(in.) - 70 stock rw deco cello-wrap
Price 1-10 - $290.19...
I am designing a lightweight road bike for display at a number of Trade Shows later this year. Bicycle frame weights are easily achieveable now at less than 900grams say using a Toray M50J Carbon. Some manufacturers are getting down to 800grams. One guy in the USA is down to 600grams about where...