I'm swapping an m30b35 into a friend's e28. He's also looking for the brackets, hence this is possibly just a feeler if he finds them first.
The block has the mounting points for both e34 and e28 brackets, so I just need the e28 brackets instead of the e34 brackets that came with the motor.
Pic for reference from realoem:

part numbers
2 - 11811175990
3 - 11811175591
The block has the mounting points for both e34 and e28 brackets, so I just need the e28 brackets instead of the e34 brackets that came with the motor.
Pic for reference from realoem:

part numbers
2 - 11811175990
3 - 11811175591