I will confirm this.
The coaxial connector is still made by Switchcraft, it's sold as a
"miniature microphone connector" I believe.
The 4-pin Amphenol connector may not be available any more, I don't know.
Regulated 5V power supplies for disk drives and the like are fine for
running the lamp. The phototube wants 70V bias but can probably be tricked
into running into mike preamp with 48V phantom, just bridging the tube between
pins 1 and 2 of the preamp and tying 1 and 3 together.
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