Mine are 10 pin. Looking at the difference, it's clear the 'click' is wrong.
Looking on RealOEM there are 2 part codes: http://www.realoem.com/bmw/enUS/showparts?id=BT93-USA-07-2005-E85-BMW-Z4_M32&diagId=36_0977
The part code for CSLs is the same as what I got: http://www.realoem.com/bmw/enUS/showparts?id=BL96-EUR-08-2003-E46-BMW-M3_CSL&diagId=36_0698
I've asked the seller, who is a BMW dealer, so may get an answer. I'll fit the wheels sans centres incase I can return them. Infact, the ones on my old wheels might fit, so I'll play about.