Not directly related to this thread I know, but be really careful about buying wheel centre caps off Ebay!
I know a lot of VW/Audi stuff is made in China (in the local VW and Audi assembly plants) but most of the stuff are sheer knock-offs.
I needed a few centre caps for my Competition alloys (identical to the caps in one of the links above) on my B5 and found a set of 4 for something like £7 delivered from Hong Kong, the picture showed VW Audi logos and part numbers etc and they matched my caps.
The Genuine price from a stealer is or was at least £7 each.
I suspected that the Ebay ones might not be up to much, but they were crap.
They looked fantastic, easily up to OEM appearance (no part number or markings inside cap though!) but the plastic is far too fragile.Even fitting a cap gently to 1 wheel resulted in the locating tabs breaking off.Out of a set of 4, I ended up only using 3.I never plan on removing those caps again as I know the 4 locating tabs/circular ring will simply fall apart on removal.
As a short-term solution they are OK, but you can't beat Genuine.