There are 2 that I know of Turbo is one and you might contact Tom Wicker in Dallas at DC West. He had the other one and I can't remember who made it.
Robert C. Maxfield II
USBC Silver Level Coach, Dick Ritger 2, ASEP, USBC Level 1 Coach Instructor, Outstanding Bowling Coach in State of Texas by Bowler's
Journal International 100 Top Coaches 2006