Pick up a can opener at a tag sale, yank the motor. We have been using um for for years for epoxy flies and rod guide drying.

Not sure how heavy the spinners are but the turntable motor off an old micro wave works really well. I build epoxy fly drying systems using them. Perfect speed and seem happy to run forever. You can find them online for about 5 bucks if you can't scare up and old microwave.