There is a firm near me in a tiny village who do the silvering process, not as expensive as chroming but you really struggle to see the difference, all the bikers round here use them. I am picking up my 550 grab rail tomorrow as, for some reason, it was black instead of chrome..£30 for 4 day turnaround. I am lucky, these guys are 5 miles down the road and Dave Silvers are only 25 miles away!