Orange C8 drive controller - DIY or do they exist?

Hello,
I have an old orange tube C8, on the original fork mount. It has an AC RA drive (tracking) and it looks like someone may have added, or perhaps it is stock in later models, a DC DEC motor. Unfortunately, I don't have a controller for these motors so I can only use the plug-in-and-track AC RA drive. Does anyone know if a controller for both AC and DC motors exists or if there are schematics out there to build one?

Thanks a lot!

Assuming the DC dec motor is the standard one (Which is really a JMI product) then you can just get the hand box for the dec motor from JMI. They used to carry a Drive Corrector which did both (Moto Trak I think was the JMI name), but with most RA drives gone DC, the Drive Corrector has for the most part gone the way of the Dodo.... I think Lumicon might still carry one. Although I'd bet an ad on A-Mart might get you one....