Yep they've been changed over, they were available from BMW in the accessories catalogue so could have been done early on, or swapped later. Quite nice but TBH for the dosh something like this would be more appealing, and live with the lights http://www.z4-forum.com/forum/viewtopic.php?f=7&t=5034 well worth a punt at less than £14k.
If you get a car that's still in warranty with BMW, you can extend it, but not once it has expired. And well worth it for me.