Had the same wheels and R32 rear on my mk5 GTI for a time, this makes me miss it quite a bit. But I don't regret getting the 6R so it's a mixed bag of emotions reading this thread. Get that rust sorted and she'll be a show stopper, plus good condition ones that have been sorted are holding value much better at the moment, so it's also a sensible move to address the body work (in case you need to justify the spend to someone!).