HPS 1200
Sorry, didn't notice your request for info. The board was made up by "a friend of a friend". It cost us about £30.00, but I suspect that was not a commercial rate. I am told that it is the kind of item that an electronics hobbyist can fabricate.
Interesting to read that Granvil Jones is still around. A couple of years ago I tried to get him to supply 5 sets of target holder wires for the carriers. He promised them, they didn't appear, I contacted him again and he promised them again. Still waiting.
Rutty