I think the new tail lights would look much better if they were sunk in a bit.
A friend made a simple tool for pressing sheet metal for them.
I cut ten pieces of 8" x 8" sheet metal with a hole drilled in the center. I brought
them with me to a friend who has a 50 ton press, and pressed them.
I then welded in a washer with a 1/4" hole, to have something to guide the hole
saw.
Then cut the holes for the light assemblies.
After a bit of filing, and drilling the two small mounting screw holes, a lamp
could be test mounted. Oh yes, this will look good.