I have full sets of Alloy wheel centre caps for Audis, VW, BMW, Mercedes and Mini, including some AMG and Alpina. Most are full replica replacement caps (excellent quality which is more than you can say for some of the genuine dealer ones), some are just the badges, so you would need to be able to remove your old badge and replace with the new ones, I can supply instructions if required.
Audi, Grey/Chrome (see pics) 68mm, similar Gloss black/Chrome, full caps. Grey with chrome 4 ring badge 60mm and same gloss black/Chrome rings 68mm and also Black/silver badges 65mm.
VW badges 56mm, 60mm and 65mm, Golf R caps 65mm.
BMW; Blue/White full caps (see pic) 68mm and Black/White same style/size, Carbon fibre same size. Alpina badges 65mm and Alpina caps 68mm.
Mercedes; Black/Chrome star with Mercedes-Benz 75mm and AMG crest also 75mm. AMG grill and boot badges chrome, AMG Edition boot badge.
Mini badges 56mm.
Skoda VRS badges and full caps 56mm. Front.rear roundels black, VRS black grill badges.
Ford blue/Silver caps 2 sizes.
Jaguar R caps 59mm.
Also have BBS badges, Red/Gold 60mm, red/Silver 60mm, Black/Gold 65mm and Black and Silver 65mm.
These are what I have in stock but I can get others although they may take about a week to come, just ask. Prices range from about £14 for a set of caps, Audi, BMW, Mercedes, AMG and Alpina a bit more and badges around £10 a set for badges, if you can pick them up that's best but otherwise postage extra. If you are not sure about anything just send me a message and I will help as much as I can, Thanks for looking.