The official BMW USA site is now listing the 50th Anniversary Classic M Roundels.
https://www.shopbmwusa.com/search/50-Years-M-Heritage
Interestingly, you can select a legacy BMW vehicle and it might give you the correct PN.
They don't provide the personalized services that our outstanding vendors on Bimmerpost provide. So use it as a last resort. Seems to be incomplete, so maybe wait a week or two.
In general, most US-based retailers selling the 50th Anniversary Classic M Roundels are getting them direct from BMW in Germany. So the wait is 10-14 days. That means ordering from UK and EU retailers might actually be faster, if they have them in stock or in a BMW Parts Warehouse nearby. It is clear that BMW is hoarding the 50th Anniversary Classic M Roundels both for ///M cars coming from thru the factory and as Retrofit OEM parts, since they are in limited supply. The 50th Anniversary Roundel OEM Parts might still be coming to US BMW warehouses in August, but I think we are still months away from wide scale availability in the US.
Cheers