Micro Studio Camera 4k and S.bus Auto Focus controller

Does anyone have any recommendations for a method of controlling auto focus on these cameras? The application is going to be a roaming gimbal operator with wireless RF video transmitter, so control would have to be S.Bus. I don't need any zoom control or anything else, just auto focus. I have seen various controllers posted about several years ago when searching around, but nothing too recent. If anybody has any advice, I would greatly appreciate it.