Turn Signal Switch / Brake light

The car is a 1970 Dart - non Rallye instrument cluster

I know this has been discussed before, but wanted to double check before I throw parts at this just in case I'm missing anything.

What works:
turn signals (front and rear)
tail lamps
headlamps
instrument cluster indicators and illumination
dome light check
front hazard flashers

What doesn't work
brake lights
rear hazard flashers

The harness and electronics are pretty pristine. Nothing is chopped up. I replaced the bulbs and checked for corrosion. I checked the fuses under load (and with the power off) for continuity and voltage. Battery is completely charged. It all checks out.

I pulled the steering wheel so I could access the turn signal switch leads at the switch and confirmed I'm getting 12 volts at the white wire (on both sides) when depressing the brake pedal (white input and white wire going through the hazard light switch and to the turn signal cam area). However, that power is not making it to the brown or green wires when braking only when I activate a turn signal.

This must be happening at the turn signal switch. I confirmed continuity from the steering column harness/plug to the body plug under the kick panel and from there to the tail light itself. Again turn signals are working and there is continuity at that ground in the rear.

SO - I'm guessing the issue here is I need a new turn signal switch - or is there anything else I am missing?

Just hate to replace the original switch if it could be anything else. My experience with these cars is the new replacement switches aren't all that great :-/

Any advice is much appreciated.