Shawn Carlock makes a great add on cheek piece but its more then $40. In this case I would say you get what you pay for. I would be a bit suspicious of a $40 add on cheek piece. Make sure its quality before you start drilling your stock!!
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.