If they are from the OEM cone-style,you would be better off finding a 2-series unit,and robbing the guts,or just getting another 3-series unit.
I am out of town for 4 days ... sorry ... we have our big seattle auto swap meet this weekend I have 3 booths and vend .. I may have a chance b4 I leave at 9am tomorrow
My pinion pin slid out and broke causing some of the teeth on the ring and pinion and spider gears to break
Unfortunately no pictures. I had to put i back together so I could move the car. If I can get out by it I will try to get some