This product is available but minimal stock. SRAM has discontinued making the shifter that works with this mount and modification. Contact us to see if we still have any left
 
Double Tap Shifter Mount and Modified Lever: for using SRAM Flat Bar Double Tap Shifters to wrist or back of hand shift. Can also be set up to shift with thumb or fingers(contact us).(Pictured with QuadGrip and Shifter. NOT INCLUDED)