My search indicates that they call them: "Cinch Beau Jones", "Cinch Jones", "Jones Plugs"
A quick search, I found these sites that sell them:
Hy-gain controller manual show that my controller uses them too. However, the used rotor/controller control cable did not have them installed. I think I will just use another connector or skip them altogether. It is more expensive but I think powerpoles can be used. I was thinking of the Power Pole clones that you can get on amazon.
I am sure Newark, digikey or mouser will have a connector that can be used in it's place.
Let me know if you find a place to get them.
John