I have a driver side rear bumper light that keeps falling out. After inspecting the passengers side light, it seems one of the retention wires that hold it in place in the bumper has broke. I could probably bend a piece of wire to make another, but there are quite a few bends.

anyone know where i could purchase the retention wires?

 

It's not likely that you'll find that wire as a replacement part. You've got couple options:
1. Go to the junk yard and pull that spring from a vehicle there.
2. Duct tape on the back of the bumper.
3. A dab of epoxy or even silicone caulk to "glue" light to the bumper.