That NOS one is the way I always have known RR/GTX to be painted.
From what I have seen, that is how most RR/GTX are done up.
Satellites are all silver, I customized mine with dark argent and silver on the inner and outer edges, plus I did the little ridges in between the lights.
My car:
If I could only find a rear bumper filler.
Below is a 1973 (supposedly) all original SSP I purchased and delivered from California, that I used to own, I was surprised it had the roadrunner style bezels. And extra NOS parts I got with the car were some RR style bezels painted in the same way. I believe this to be the correct paint config for the RR/GTX. Not sure why these were on this SSP when I got it.
The first one is just like the one my grandfather bought new, with a towing package. That car is the reason that I own mine. I think the engine finally blew and it was left somewhere near Moose Head Lake in Maine after a very cool life...