There are 3 versions of the cap though, all part # ANR2391, but ending in different colour code letters:
ANR2391MNH "silver sparkle"
ANR2391LAL "pewter" (for Tomb raider, or just the grey coloured wheels)
and if you've got green wheels, STC60745, but they're £23 UKP EACH!!!!! crazy, the others ^^^ are about £2~£3 each.