I have disassembled the headlights, cleaned the reflectors and applied the silver compound to them and polished them. It really does make a difference in reflectivity, but there is still some minor pitting in the brass itself.
The lamps and sockets were obtained from Ron Frances. While they do fit the holes in the reflector, I don't yet know if the filament being 90 degrees different from the original MOPAR lamps will have an effect on the headlight pattern. If it does, it will certainly be easier to make a jig to drill three new holes rather than locate the one-year-only sockets and lamps.
I am re-wiring the headlight circuit to use relays and mitigate any voltage drop to the lamps and should have it all done by the end of the week. I'll post again if I have to drill new holes.