you guys might want to consider looking into the Carbon Fiber Mirror Replacement from this supplier in China. I got mine 6 months ago and fit is ok.
These are full replacement CF mirror covers on your F30. I removed existing painted mirror covers and installed these on both sides in 15 minutes. No need to remove mirror lens and nothing to screw or tape on. The manufacturer moulded clips same as OEM attached to the back of the cover that snaps into place on existing slots in the side mirror assembly frame.
Paid USD130 for the pair plus USD27.00 delivery charges to Australia.
heres's the link:
http://www.aliexpress.com/item/2012-...931587098.html