[A4] What and where to buy?

[Jeremy G]

Hi all, I'm new to the list and need some help finding the center wheel caps for my '97 Audi A4's rims. Does anyone know the part number for the center cap and where the best place to buy a replacement is? A picture of my wheel is below. I found a center cap on ebay, but it looks like it might not be the right one since it's all dark silver. The ones on my wheels have chrome on the audi logo like in the picture below.
 
http://www.audiworld.com/tech/pix/a4-5spoke.jpg
 
I'm also looking for replacement lug caps and updated tail and head light assemblies.
 
Thanks for any help you can provide,
 
Jeremy