Thanks for the comments guys, i agree finding the right overriders is a pain especially considering the car should already have them lol, i think they were prob removed at some time to make room for the cibies.
There is a full set of 4 of the bay at the min Mad Mex with a day to go and presently at £128 plus the postage, im looking for around £175 for mine, and for that you get the 4 cibies, the covers and the 2 x alloy quick release mounting brackets, i would guess postage would be around £25 on top of that, if postage is cheaper than £25 i will refund the difference. I am putting them up on ebay tomorrow, so you could always just bid on them instead if you like.
There are some really smart cars on here, looks like i have my work cut out to get mine nice like those.
NeilT, the Harriers were available in only silver (500 made) or white (1000 made) as far as i know.