Web search indicates that:
"The PWRC (Portable Wi-Fi Rotor Controller) by AF6SA is a versatile controller compatible with many popular rotors like Yaesu (G-400, G-800DXA, G-1000DXA), Hy-Gain/Telex (HAM-IV, T2X), Channel Master, RadioShack, and RCA (VH226E)”
Very cool project.
Problem is, most of those rotors are pretty expensive that have the lateral stability. You can find on eBay but they are $400-500.
Might need to think about creating some sort of mast collar with an bearing to absorb the lateral forces, like on some of the rotating tubular towers.