OK, I checked my old tail lights and the left one is in perfect condition. The right one has a little damage which is probably why I replaced it.
This is the damage on the right side. Sorry for the fuzzy picture, for some reason my camera on the phone has a tough time focusing at times.
If you want the left one, you're welcome to it. I upgraded to AMG style housings so I can't even use it for a spare. When you get it, you may have to transfer some of the screws and mounting studs from your assembly to the new one as I found some differences in the mounting style between the AMG style and my originals.