On my last car inspection (at the local Audi dealership), a few key points to pay attention to were given. A minor leaking radiator being one of them.
Not all parts are easily available for these classic cars any longer. For me to source a suitable radiator was a bit challenging. Especially if you’re after something manufactured, and not an aluminium fabrication (aftermarket upgrade radiators).
From Behr – now a part of the Mahle corporation – one can source a CR 254 000S. These are around €100-200, depending on offering. Style-wise, they are the new style with plastic end tanks anc connectors, and not full metal.