Where can I get tail lights?

I've seen the housings, the bezels, and the lenses available individually and in complete assemblies on eBay.
You can also check with FABO member, Rick@Laysons, to see what Laysons may have in stock. Rick will treat you right and only sell you what is available from stock. I got a good deal some time ago on some new bezels that were on sale due to a very minor flaw in the plating - I looked extremely carefully and could not find any flaw in the plating.
Layson's doesn't have a sterling rep, but Rick is 100% OK.