I know I have seen this question come up from time to time.
I came up against a General Electric low voltage light switching system with several defective relays. Are there parts still available? The relays were red and were in two rows on either side of the panel. I didn't have time to poke around much, are they AC or DC? Voltage? What do you guys do, hunt down the replacements or replace with an appropriate ice cube or such? Are there switches and cover plates available from anybody?
Just a historical note which might be of interest: I was browsing through a 1949 issue of Electrical World, and saw new-product announcements for manual and motor-driven selector switches for the GE system. I didn't realize the product line was that old.
I'm sure that you are correct. It's been over 25 years since I worked with those much. My boss was the crafty one who managed to find ways for us to service these systems. He was much smarter than I was at that time.
Although the relays are available, be aware that there two types, a three wire and a two wire. The two wire units are not available, if you have that type you use an "ice cube" relay and a standard switch.
Also know that the switches are not available in the their original form, P & S does make a replacement but does not look the same.