I once had a similar article on fixing the curb rash but I cannot find it. The article claimed that several European cars had the same wheel paint.

AudiWorld Tech Articles

I use a local Hubcap Annie for my curb rash repair. Search the name and call them. They have several locations in the US. They might agree to send you some primer and paint. I have had several wheels repaired and they look like new ones when the repair is completed.