I originally started out with the Digiflight II autopilot with servos. My control head had a failure sometime between the ten years I bought it and the time I finally started using it after a long build (don't judge me
). I contacted Bendix King and they got me in touch with the TruTrak guru to troubleshoot the problem. I'd have to look in my file at the airport, but I believe the guy worked for one of the avionics suppliers on the west coast.
After we narrowed it down to the control head had gone belly up, I purchased an XCruze 100 from them, as it was well out of warranty. There were a couple of pin assignment changes to make in the D-sub connector in the back of the control head, but that was all it took to make the transition. I would assume the servo would be a similar change, as none of those pin assignments had changed.
Call them up when they open in the morning and they should be able to get you hooked up.