I managed to loose a centre cap off my alloy.

Problem is I have never seen these wheels anywhere before, they have OZ racing centre caps, but am not sure if they definitely are! (the bit that says OZ racing is stuck to the metal bolt bit, I suppose its possible someone at some point could have changed it?) And yes I have managed to loose the whole thing!
Anyone seen these before?

Any ideas where to look for a centre cap? I have tried ebay - no luck
