Somebody who liked Northgate Omni keyboards, there's another source.
Keep a eye for Zenith keyboards, they use same switch assembly
snapped through steel plate and pins soldered to the circuit board.
they have same feel (fainter clickness compared to CLATTERING model
Ms) and keyboard is heavy. They are usuually found for XT and AT
zenith machines that are models 1xx (8088), 2xx (286 or 386sx) and
3xx (386dx) era.
There was one or two toshiba models used hall-effect keyboard, means
liquid spill won't faze them.
Cheers,
Wizard