I was inspired by Chicks 68.
Before
&
After.
Disassembled Factory removed from my Bumper, Degrease, Cleaned, Evapo-rusted, light glass bead, Impossible to fix pits in metal, Lens-Screws to (Plating) clear Zinc, Housing to (Plating) Zinc Dichromate, Clean gasket, Clean & Polish lens, Clean Bumper bracket Grommet, Mounting-Screws Manganese phosphating, Polish center contact, Test with New Bulb and 12vdc source, Black Wire, Plastic connector & Packard Series 56 female terminal replacement optional.
I find these housing at Swap meets for around $5.00 plenty out there.
Notice it is the Correct Narrow 67/68 version with locating tab.
Hope this is helpful.