Why would you want anything other than the Gemini? Cost? You get what you pay for. Its not just a control system it also comes with a set of servo motors, not steppers, The control system itself has a lot of very nice features not found on many control systems. When setup correctly it provides a very accurate and easy to use interface. There have been a lot of complaints from people about the hand controller and it's use but believe me it is simple and very easy but you need to get used to it. Meade, Celestron and Synta all make control systems for there mounts but not one of them gives you the feedback or accuracy of the Gemini.
As for your original question, I'm not sure but believe there will be something else out there. It may not be specifically made for the Losmandy mounts but may well work with them.
The gemini system can be fitted to other mounts with most parameters adjustable. Try the Losmandy Yahoo group.
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