Why dont you get it at your local dealer???As Supergreg says,its cheaper to buy oem!
The dealer can order for you anything on the European accesssory catalogue.If you want something on the Usa catalogue ,it will take you them about a week to order as the part nrs. are not on the European parts system and an order has to be placed by your locar dealer to BMW GB,to BMW AG ,who will then place order with BMW USA.This is how I get my parts on Usa catalogue(I just got the Rear bumper step protection which is USA item only!)