You can order from Velvac directly. We replaced the mirror bases that had the peeling Chrome for about $250 each! The entire mirror would be $1100. Go online to their website and pinpoint which mirror style is yours before calling. They do have a lot of information on the site about repairs and installation. Others I know have had them replated or painted to match the coach.
when I stopped by Northwest RV Supply last summer, they had a pretty good selection on surplus Velvac mirrors and parts. Everything from individual glass parts to castings. Also, major sub-assemblies and complete mirrors. Prices were reasonable. (866) 678-7467
The guys there were very helpful and knew their interchange stuff. I bought a used base casting for my mirror and repaired the mirror myself.
Tom & Jan Full timers since April '06 - 1 fur kid (Archie - mini Poodle.) 2006 Beaver Patriot Thunder towing 2012 Subaru (4 down) Started workamping Sept '07 - "This isn't too bad. Think we'll do it some more."