My home was built in 1963 using low voltage switches for all ceiling electricals. Wall mounted light switches are connected to relays in the basement. I do not have a problem buying replacement relays; but, I cannot find any electrical distributor or contractor who currently handly replacements for low voltage (rocker) switches. If anyone can help, I would appreciate it. Further, in this corner of Michigan, I cannot find an electrician/ contractor who has ever worked with such systems or even wants to work on such a system; now 40 years old. I have two banks of 12 relays in two different locations in the basement; poorly labeled. Discovery is my method of repair and replacement.