Bump, updated listing. I have been heavily questioned about the wheels, by some VERY strange folks on facebook and elsewhere. Allow me to clear that up here as well: B7s in the US were not all equipped with the 21" wheels. These are the factory wheel option on the car, indicated by the door sticker and build sheet. They are called Alpina Dynamic 19", and they were fitted to cars with all-season tires, or winter tires. More common in European markets it seems.
Factory part number 36107980144 as seen from BMW, or Alpina part number 36 11 795
Can also be seen in the original F01 B7 catalog on
https://www.alpina-automobiles.com
Thanks again for looking