Buy TRP Matchmaker - HD 3.3 I-Spec B to SRAM MatchMaker
Wolf Tooth ShiftMount SRAM Matchmaker Shifter to I-Spec-II Brake - Pro Bike Supply
Amazon.com: ShiftMount Integrate Shifter Mount Matchmaker I-SPEC II Clamp Band Adapter Aluminum for Shimano I-Spec II clamp Brake Lever Integrate Sram Trigger Shifters Lever (Left) : Sports & Outdoors