ORIGINAL: DICKEYBIRD
encan CF rod is available pretty cheap from Superior Balsa
http://www.superiorbalsa.com/ I like the .070" stuff because you can sand one end down slightly and CA it into the little 2-56 threaded brass doohickeys and screw on a nylon mini-clevis.
I have found Goodwinds Kites to have a good selection of CF rod and tubing and to be very competitively priced.
http://www.goodwindskites.com/
Andrew