I bought some chrome replica b6 USP wheels that are 18x8.5 with a 5x100 and 5x112 bolt pattern. They only came with 3 center caps, annd they arent in that great of shape either. I tried center caps from my a6 pie plates, a6 2.7t s-line 5 spokes, b6 18" avus, 17" avus, 19" a8 monoblock/vortex wheels, and stock a6 16inch 6 spoke wheels. Some of them fit with a gap, some the tabs never touched the wheel. I found some center caps that look the same on ebay but they say in the ad "Dont fit replica wheels." So my question is, where can I find center caps that fit? Either oem audi or another set of the replica ones.

http://imgur.com/a/9t7ub

First 2 pics is one of the center caps that fits the wheel, follwed by the wheel itself and some of the caps I tried