I have a set of these on my WRR, they cost me £15 delivered from Hong Kong. They withstood travelling through Russia(Road of Bones), Mongolia and the 'Stans' and all through Europe, but bent one at home whilst greenlaning at speed and came down hard on chalk, but at that price I also have a spare set.
http://www.ebay.co.uk/itm/130493780089?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649