Larry, I might have an old electric motor that I bought off of ebay for about ten buks. I bought several of them. One is my drying wheel, I have one for turning rod wraps. I'm pretty sure I've got another. If you can mount it to a support, fit it with a chuck and create your wheel you'd be set. I'll try to look later. Otherwise hit that auction site for an electric motor, lots of options there.
OK. So I just finished making my own. I didn't get too fancy as I was lazy. I got the motor shipped to me including postage for $15.94. Bought a couple of washers, a bolt or two, and glued three pieces of 1/4" foam together and used a plastic lid cover for the backing. Maybe I should have bought one for $39.95, but it was fun to tinker. The motor turns at 3 RPM.
Looks great and it is fun to tinker. Just an FYI with the wheel mounted over the base make sure you have enough clearence for some monster flies if you tie them. I had my dryer set up like yours worked great untill i tied up some larger salt wter patterns on 2/0 -4/0 hooks. They would hang up on the base while turning. Easy fix just reversed the wheel.