I've gone to Eric at European Car in Ironwood for both parts and advice. Primarily A VW shop (his father worked at the VW plant in Wolfsburg I believe)
but good on anything German. 906 932 5720. has a couple 123 parts cars and a 126 around I think. surrounded by a sea of VWs. tough to find someone knowlegable about those cars in a remote area. I live in ashland, 35 mi west.

karl