I am looking for links to german parts suppliers who deal in classic german cars and restoration. I need brake parts, carb kit, etc. for the project. Thanks

audis rock. get a "European car" magazine they have loads of suppliers in the back that specialize in audi /vw restorations. I've used them and they are great. I only buy german for my 3 audis.
Ps. bmw's are bavarian not german and porches are too finicky. fast but finicky. besides audis haul groceries really fast too. I'd like you to email me a pic of it.

you better get you wallet out and take out a loan to get those parts man why did you buy a 1971 audi : Audis are know for there unreliability and there not that good if you want a fine german auto get a bmw or porsche

hi
you can find parts on the web in ebay.de
most of the parts of the audi 60/75 will fit your car exept the carburetor and some engein parts.
the carburetor of the super 90 is SOLEX 32/32 DIDTA down drafaft,2-stage