Originally Posted by AGS
Those are the standard 19" wheels, model 345. The 5-star 20" inch wheels you are referring to are an option. Take a look at getBMWparts.com, they have the best prices on OEM parts that I've found.
It's crazy, but I think these 19s look better than the 20s by far. I checked Tischer's site, but no listing of these wheels. I wrote to them directly to see what's up. Really curious. Let me know if you find a link of the listing.