BMW doesn't like to release production #'s anymore IIRC.
I think the most documented car is the 03' 540i while the most specific is the 03 Msport 6SP Gray 540i. (1XX made)
One thing i know for sure is that the 4.6is sale numbers are low.
Such things like:
# produced
Of #, X are painted Y.
Are kept deep in BMW HQ