No, not mine [I haven't pulled the trigger again/yet!]. 2005 S Lux on 57k miles, offered up at £12250 and looks a fine example. Am sure Perry might be able to shed some historical light on it.
http://www.pistonheads.com/classifieds/used-cars/bmw/alpina/bmw-alpina-roadster-s-lux-convertible-2005-z4/2595705?isexperiment=true
http://www.pistonheads.com/classifieds/used-cars/bmw/alpina/bmw-alpina-roadster-s-lux-convertible-2005-z4/2595705?isexperiment=true