You need a cap that fills the centre hole.
Measure your cap and the hole so you have an idea of the important sizes.
Then:
1) look through Vagcat (Etka) for something close (or if you are lucky will clip straight in) and Modify to fit maybe using old caps and grafting it on.
2)Audi caps, Filler , paint and Decal
3) Wheel Shop+Wheel
