There were just 1933 copies of the F13 M6 shipped to the US in total across all five years of production. Of those, less than 207 were in SO. Though I don't know the exact number for yoir year and spec, I would imagine it's only a handful. Why not register over at
https://bmwmregistry.com/ and once yiu do, the owner is most helpful and would probably be happy to provide you with the information you desire.