If anyone is looking for the correct color, here's my "solution":
After searching for a decent price on 240z rear tails lights, I found a set, cleaned them up and installed.
Look great. Installing these on a 260 or 280 requires cutting some metal and getting new gaskets (or making your own which I did).
After looking at many different pictures to deterime the original color for the tail light housings I found "Dupli-Color" at Autozone.
The "Duplicates Original Honda colors" appears to match the original Datsun color right on or at least close enough for me.
Any my build: