You can try this which may be available from your LBS but is easily found online: Amazon.com : Ritchey Quick Disconnect - Derailleur (Pair) : Bike Cables And Cable Housings : Sports & Outdoors It is called a "cable splitter" and is often used on bikes with S&S couplers in the frame so when you split the frame, splitting the cables is possible too. There are other brands but this one seems to be the least expensive and works just as well as the more expensive ones. Used these on my Greenspeed GTO trike which is standard with the S&S coupler.