Robotron uses wico 8-ways with the long shafted joystick. Under the cpo should be two metal plates> 4.5" square. The joystick dust cover goes under these.
I just purchased a set of the metal plates that were a reproduction run. I can give you the fellas email addy, not sure if he has any left though. They were 16.00 shipped for the set. I'll post a pick of them in a bit

Post a WTB on rgvac on getting a working boardset. Thats what i did and had 4 emails that same night, anywhere from 150.00 to 225.00 shipped. As for the harness you can do the same or put in an order to Bob Roberts and build it yourself. I did that with my Defender and it wasnt hard at all + it saved me money and everything was brand new

edit

here>