The (at least) automatic is the same 63-72 per the parts catalogs. Available from amazon, and just about all auto parts stores. It might be special order
I can get one here in Colorado by tomorrow but in Phoenix looks like monday for you.
If you have 67 Seat frames that are not rusted apart you can add head rests to them. The head rest will need to be found (good luck) or manufactured.
'67 BUCKET SEAT HEADREST FABRICATION.
I have original paint on some parts of my 67 273 that are the same "Red" (looks orange to me) as your dist. I assume over time the red pigment faded and other pigments remained making it look orange?
MyMopar.com says 64-69 273 all were red (P4349218) P4349218 - Genuine Mopar Paint-Engine
I just have to ask....
Why do you need ANY form of power steering?
Our cars can be palm steered at just a slight crawl like in and out of a parking spot.