I have a set of 4 Bridgestone Turanza All-Season Run Flats with only 2,500 miles for sale. The size is 225/45/17, which should fit all E92 17 inch wheels (according to the brochure but you should double check with your car). I believe this may fit some of the E90 wheels as well.
*** $400 pick up or $525 shipped ***
Here are the tires before I unmounted them:
Treadwear (like new):
You can find more information on TireRack. It has good reviews: