Hi Wombil,
I think these taps are Allbar or Downey equipment, I'm not sure, have been out of the game too long (was a cellar man in the 80's).
I have a couple of these taps myself and one fitting, but it's only for a font or temprite front panel.
I live just outside Sydney and was going to contact CHANNON REFRIGERATION (no aff.) as they are at Kingsgrove, Sydney when I start my kegerator project for help/advice.
CHANNONS do cellar fit-outs and beer plumbing. Google them, they have a web- site.
Hope this may help.