I've just done a big clear out of the top of the barn, and found seven (no idea why seven) VW plastic wheel trims. We used them when we were running the Touran to Switzerland on steels with winters. They are in danger of being tipped in the skip but anyone on here can have them for the postage. They are for R16 rims - we have rims for 205 55 R16 tyres. Kind of generic silver six spoke plastic with VW logo in the middle - VW OEM not cheap things.
Txt me on 0770 250 5256 and I can get them to you.