There is a 1985 E23 735 just arrived at the Sun Valley (LA-North Valley) Pick Your Part. Photos aren't great but it appears to be a manual. The 1985 model came with the Getrag 265 (and Motronic Bell Housing). No guarantee the transmission is still there, and it will certainly be gone by the end of the weekend. But if you're in the area and can get there this morning, it's worth a look.
https://www.lkqpickyourpart.com/locations/LKQ_Pick_Your_Part_-_Sun_Valley-263/recents/1985-bmw-735i/
https://www.lkqpickyourpart.com/locations/LKQ_Pick_Your_Part_-_Sun_Valley-263/recents/1985-bmw-735i/