Talked to Dave W, across the pond, and decided to go for this.
Researched the control heads / trafficators, found and purchased a very nice one, or part of one, which was all I needed. Since I can't use it as intended, I don't need the mounting, or cancelling, or other stuff that will just get in the way of my intended installation.
Backside with connections, no mounting yet as I will need to design and machine that:
Since I will not have the tube for the wiring down thru the steering shaft as on the Healey, it was either put in a slip ring (NO way) or do it wirelessly. I figured that my garage door opener has been working just fine for years, so that seemed to be the way to go.
And the receiver also three channel with 5 amp relay outputs.
Figured out where I needed to solder wires on to make this thing work
Limit switch for the self cancel is on the way as are relays and sockets to make the whole thing work the way it should. Signals will be self cancelling and able to be cancelled by hand. AND the hazards will function. More later, gotta go do something semi-constructive.