These are the cheapest I have seen and remember this is per side.
http://www.aliexpress.com/item/Roewe-mg7-side-mirror-shell-roewe-750-rearrests-shell-eslpodcast/1181876306.html
Hopefully of some interest to some members?
I'm ordering mine when I get paid at the end of the month (spent me fun money for this month D )
Dave