Vendo 220-125 parts?

Hi, I am looking for a part for my Vendo 220-125.  The number on the cast is 370937.  I am not sure that this is a part #.  I am not sure what the part is called but it is a cam piece that fits over the shaft for the vending bars and activates a switch for the motor.
Does anyone have this piece, know what the part# is or can tell me where I can get one?  Thanks, Vern (rnt2u@aol.com)