[W8ZV]

You can harvest a mercury switch from a old style HVAC thermostat.  You gotta put the capsule in the existing holder and readjust it to work, but that can be done.  I did complete restorations on a pair of 46-1201's for a fella in TX about 10 years ago.  The original had disappeared, but the old guy wanted a pair of them to give to the kids.  Seems that the original was an anniversary present to his wife in '46.  It was their entertainment system for a long time.  The old fella wanted the kids to know and remember their parents with the radio/phono's.  They were modified so that the hot chassis was not an issue and the turntables were restored so that they played.  Seems the old guy still had the records (a stack of them), and wanted the kids to enjoy them like mom and dad did in '46.  The whole projects was in the $1200 range.  I had to buy two more radios to get enough parts to make two complete units.