The cap that you need on your wheel (which is actually more of a cover plate) is made up of 5 pieces. After checking everything what both us and OZ have available I unfortunatly can not make you up a set of caps (and the pieces are all no longer in production).
I do however have enough pieces to make one full plate up minus the outer OZ logo if you can find anyone else that has a used set or something of the like.
I will list you the part numbers needed along with what OZ and myself have available so that you can possibly keep trying to find the pieces. Here you go:
1. OZ F1 center plate - I have 2 available @ $55.00 each
OZ part number - M601
2. OZ F1 center nut- I have 1 available @ $30.00
OZ part number - M575
3. OZ F1 sys logo - I have none
OZ part number 91400276
4. OZ F1 center nut wrench M604 - I have 4 @ $10.00 each
OZ part number - 90400068
5. OZ F1 lockset - I have 4 available @ $8.00 each
OZ part number - ozlockf1kb
Sorry we could not help, it sounds like you may have all of the pieces of the plate other than the one I can not get
Aaron@TR