Did some research and found these:
http://www.justroadster.com/products...r_z4_2010.html
http://www.roadstersolutions.com/page69.html
http://www.windblox.com/styles/bmw_z4_windblocker.htm
http://ur-windschott.de/pageID_9307028.html
Now I need to figure out WHICH is better and which is worth it
And yes I need it
Just drove her back from the dealer
Love the car, but the wind was crazy
Reminded me of my e93 prior to getting the Wind Deflector
The wind deflector was one of my most useful mods (out of all the engine suspension and cosmetic ones i did)