http://www.k40.com/
Another thumbs up for K40 CB antennas.
I broke mine on Outer Limits and sent it back with a note that I would understand if they didn't cover it since I obviously abused the one I had. They sent me a replacement with no questions asked. Not only that, they upgraded me to their beefier model at no charge.
Look for K40- antennas wherever CB accessories are sold.