da Vinci Designs also makes cable splitters.
Edit: Whoops, wrong thread for the above comment. Sorry.
I'd just grind off the other ear and make both sides flush with the lug and use a seatpost clamp. Don't even consider welding it as the heat will distroy the carbon tubes and I can't imaging any glue or epoxy will be strong enough.
Last edited by HillRider; 08-29-08 at 08:43 AM.