Distributor rotor sprocket mount

[TB123]

I cracked the part that the distributor rotor screws onto. It is a small cast metal part with 3 "wings" that are tapped for the rotor allen screws. What is this part called? I'm having trouble sourcing it online. Thanks

[Lugnuts]

It's just called an "Adapter". Part number is either:

11311287625 - up to 12/1986
or
11311713064 - after 1986

Number 7:

http://realoem.com/bmw/showparts.do?model=1412&mospid=47283&btnr=11_4365&hg=11&fg=25

(Confirm compatibility with your car/engine).

http://www.ecstuning.com/Search/SiteSearch/11311713064/ES22095/

[TB123]

Thank you