Brodit Mobile Phone Passive holder with tilt swivel model number 511422. See http://www.brodit.com/product.html?id=511422. Works very well with Brodit Angled mount Item no 653655 (NOT INCLUDED) see http://www.brodit.com/product.html?id=653655&pn=prod&brand=BMW&model=Z4&year=2006. 
Retail price £25 (ish) happy to get £12.50 postage paid
Retail price £25 (ish) happy to get £12.50 postage paid