BMA in Glendale, CA or Pelican Parts, CA
BMA in Glendale, CA
Occasionally you will get the new guy answering the phone who doesn't remember E34s, but they have very high quality parts and you can find someone who knows your car if you ask for it.
Pelican Parts, CA
Great sources, the only issue being tax if you live in CA.
I know Pelican has the actuators and they look cheaper than e-bay. Pelican seems to ship before you logout.
If you need the actual arm, not just a new wiper blade assembly, you may be better off looking to a salvage yard, but check with these two sources for sure.
1995 525it (2)