I bought mine a month or so ago from Mark at BMAutosport. I would mention the site, if there's a deal to be done, I think he'll do what he can. I was really impressed with the service and haven't heard anyone on here say a bad word about them.
I'm not sure if all the CSL reps he does are the same but I went for the Hyper Silver finish in 19x8et34 on the front with 225/35/19 Falken 452 tyres, and 19x9et37 with 265/30/19 falkens on the rear. The centre caps are non standard (56mm) and I tried a few sets from eBay which were cr@p before coming across these which are a great finish, as near to oem standard as I think you'd get.http://www.ebay.co.uk/itm/BMW-ALUMINIUM ... 541wt_1002
Heres a pic of mine - no rubbing or issues with standard Si sport suspension (the pic is an old set of centre's that did not not make the grade).