JB:
I/we painstakingly rewire/rebuild fixtures for our regular clients. Yes, I know what you mean about the "oldies".
I have a tough time finding parts occasionally. As to the LV idea, yes it may be safer, but ya gotta locate a transformer. There are LV sockets, and bulbs available that can be adapted to any design you come up with. Small compact electronic transformers are available around here (up to 150 watts) A good supply house can help ya with the sockets.
If I can help you further, let me know.
(E-mail is in my profile)
John
