I cannot find a 1/4"bore pulley anywhere. Do they just not exist? I want to upgrade my Axworthy Ghost from a bread maker motor, which is too slow, to a sewing machine motor with a speed control (dimmer switch). My current setup is designed to run the powered pulley directly off of the motor. Is there a pulley that is 6-10 inches in diameter that I can use on a 1/4" shaft?