My house was constructed circa 1963 and the wiring is all based on REMCON low-voltage units. What a pain. I still can't find exact form-fit-function replacements for the narrow, clear-plastic toggle switches (with little bulbs), but I did find a distributor for the Amprobe replacement relays. It's Hill Electrical Supply Co, Glens Falls , NY. (518) 793-3536. They allow go under Dale Electrical Supply and publish a catalog. Their website is http://www.dale-electric.com/.
They also have replacement rocker switches, but they aren't same form-factor as the originals (at least in my house). They sell brushed steel cover plates for these switches. I'm going to make customer covers for mine.
If anyone finds a supply of the original switches, please let me know.