Sorry only just read that there for a five series not for the zed hope you find some soon I had my set on a 3 series and they do look good but a pain to clean.
You'll be lucky to find a genuine set in good condition, I've been looking for about 6 months ( also for a 5 series ), when they do come on the market they seem to fetch upwards of £1200 a set and still need a referb, the edges of the rims are usually very badly chipped.