Snoops wants the replacements Asker, not the faulty ones.
The only reason I never bought a set of Shadows was the fact from previous mk5 experience I knew there would be issues with them. And as my car originally came with poverty spec 17s VW wouldn't honour the warranty if I tried to claim for substandard finished Monza Shadows at a later date once my second hand purchased wheels went the way they all do.
I'm sure what Geoff wants to do is get hold of a brand new 'second hand' set and treat them with all manner of potions he has to prevent them from going all milky in future. Then he can put his powder coated 17s back on in winter when it gets really grim oop North.
Edit: Looks like Geoff replied himself whilst I was typing! 
^ what he said.

I agree about the shadows as i had the same problems with the mk5 too. Its why i did not go for them But i keep looking at photos on an American site of cars like mine with them on and keep thinking...
http://www.golfmk6.com/forums/showthread.php?t=16515Its all down to if's, butts, maybe's, and price as i have watched prices since 2009 and somtimes regret not buying NeilGTIs when he sold his but other times i think mine are fine especially when you take corrosion and road conditions into account but other times

..
Edit: I removed my post as yours made more sense.
