Help finding a centre cap

Hi, i'm looking for a center cap for the alloys on my partners cabby. I've searched for ages on the net and can't find one anywhere - eBay, google search, french sites. can anybody point me in the right direction?

Here's a pic of the wheel in question:


Thanks in advance 

Does anyone have any idea? I also need a new numberplate base for the front bumper, i cant find either of these parts anywhere! cf_emoticons__BangHead:

They look like 'le castellet' wheels -   do VW not do centres ?

I guess they might but I can't find a part number, it seems to have worn away on the others. Thanks for the name though, I'll do some digging 

Gaz I have a scabby set of these in black in my garden. I will have a look at the caps and see if there's a part number on them for you mate.

Brilliant thanks a lot!