I have a new carbon fiber Baron boom for sale. It will only fit a standard Baron....the X-Low Baron requires a boom with a more extreme derailer tube angle. The carbon boom is made by Velokraft, and is about 300 grams lighter than a stock Baron boom. It does not have a hole for the derailer cable or a cable stop. the cable stop is easily attached to the derailer tube with JB Weld. Price is $225.00 with free shipping in the continental U.S.