Well the FP Transmission is finally completed and posted in the mechanical library of the FIRST CAD Library. This one was tough. Injection molded stuff is a pain to draw and be warned that I had to make a few judgement calls and assumptions. The model is close but if you are going to make a part to capture the housing then I would invest a little time in comparing the model to your actual part. I tried to pay close attention to the end of the model where the output shaft is. The 3 screw pattern and the final gear shaft are pretty close to the FP transmission I have.
BTW This part is metric (mm)
FIRST CAD Library