Good morning,
I do work for the police, and get quite a few junk cars in my yard. Once the lien clears, I go through them and try to pull them out. The BMW's seem to be the best, both with the tow screws and the release handle to put them in neutral (BMWX5 SUV), and some of the wheel locks are the same.
I also try to pull out the tire release from pickups I junk.
I would bet that any junk yards, like U-PULL, or U-Pick kind of places would have this and they would charge cheep prices.