Bulgin make some in their Buccaneer range. Communica might help you, or Avnet/Kopp. Not so pretty though. Black plastic.
Neutrik makes one like the Switchcraft in the pic, but not available at RS. They do have a mil looking one from Amphenol for a measly R500+ Yikes!
Communica have a couple of common PCB mounting types up here. They may even have that same Switchcraft. Sit down when you ask the price of any Switchcraft connector though...
Why not go with the normal PCB mount metal box type thingie?
You must be up to something very interesting there...