Originally Posted by juanesoto

I just found the anwer to my own question. The part number is:

124 260 0701 7174110 - 1207569

If you look at the picture, that thing looks a lot like the 4-speed and the 5-speed from a w123 (except for the starter bump on the opposite side).

My bet is that its possible to use the bell half (front) of the housing from a 4 speed and attach the rear half of the W201 gearbox to it... But who knows...