[Arran]

Fortunately the more traditional octal sockets are not at all difficult to find either, also thanks to relays, the Japanese Omron company also makes them, theirs look much like an Amphenol made octal mounted to a diamond shaped mounting plate. I've used some Soviet/Russian Amphenol copies,(actually improved copies), for socket replacement, they were intended to install into a keyed hole in a chassis so I had to cement them in place to stop them from moving in a chassis with non keyed socket holes.
  There are two legacies out there from RCA and G.E, one is the phono jack, and the other is the octal based tube socket, both are hardware related more then electronic.
Regards
Arran