Terminology problem. You have the male and female connectors with pins and I'm guessing you want the rubber boot?
Compare the size with a rubber boot on you tail lights. I do know these are still made.
If all else fails, I would clean the contacts, apply a small amount of dielectric grease and wrap it up with the best grade of Scotch 3M electrical tape.
You can use heat shrink but the shrink has to be cut if later you wish to remove the light.
