they look like the foil containers my indian take out use, could you be a pioneer (pun intended) and use 2 fray bentos tins?
I saw these on a bay the other day, I actually thought they looked great and was looking to do the same with mine. Bit scared to drill any holes so I probably won't!
I had these on me crew cab, they are called West Coast Junior mirrors, I shopped around the US and found them cheaper than the UK even with the postage http://www.awdirect.com/west-coast-mirror-junior-cham-cal-engineering-20852/mirrors/
That company sometimes has them on eBay. That's how I wound them. Not cheap but look good in my opinion