I'm currently doing research on the BMW E39 M5 on color rarity. The information I have is almost complete just need feedback from the Individual owners.
If you are one of them could you state the last few digits of the vin, and interior & exterior color codes? There is (was) 95 of you with RHD and 261 LHD M5s!
https://www.carsaddiction.com/en/colors/bmw/e39-m5
I also have done this exercise for other M cars, refer to my signature below for links.