I took the el cheapo ones, well, they are el cheapo. I had to get M10x1.25 nuts to fasten them, the mirror surface is not ideally flat, and the articulating joint is not great (tends to spring back to the middle position). But they look kind of OK and the price is right.
http://www.ebay.co.uk/itm/PAIR-UNIVE...em4ab47 e9b8f
