My 2010 A6 is almost here. Does anyone know if I can get the 2010 S6 Mirror Metal Covers to fit on my car? Does anyone know where I can buy them outside of the dealer for less than retail?

Yes you can retrofit the brushed alluminum mirror housings from the S6 on to your car no problem. It's a direct replacement. oemplus has the housings for sale...pricey though...

http://oemplus.com/index.php?main_page=product_info&cPath=60_74_150&products_id=980