HELP! I have a 1998 Hunter 376. The X-5 wheel pilot that came with the boat just doesn't cut it. I am upgrading to a new EV-200 with a rotary drive. I need the sprocket that mounts on the wheel shaft to complete the job. I am currently in Portsmouth, VA heading to Marathon, FL. The autopilot will be here on Wed. (26 Oct. 2016). Does anyone know what size and where to get one?