72 Demon Power Steering Gearbox/Coupler Help...?

Help- I have to replace the steering coupler on my 72 Demon-

340 w/ TTI Headers, Power Steering, 4 Speed

Guy replaced the lower pinion seal, and the upper gearbox seal said it would take care of it. In doing it, he wallowed out the roll pin hole,and gummed up the splines on the coupler. Now I figured out its my gearbox that is shot, and leaking like a sieve - leaving a constant bloodtrail everywhere.

Decided not to spring for the Firm Feel, or other performance gear, went with a factory rebuild. Finally found a reman power steering gearbox (Auto Zone was backordered, would have been 1293 on a waitlist, NAPA or O'Reilly's can't even order them.) I have the reman gearbox ready to install. I can get the upper bearing, and coupler rebuild kit, even the spring retainer. Now I am trying to find a coupler.

Any ideas on where to find a good replacement coupler, new or used? Factory ones are not available short of $200-400! Does Dorman make one that will work for power steering for my 72? I know they may be out there for manual steering, but I have power steering...

Any insight for a Dorman coupler part number or equivalent, or does anyone have a good used one? Any help would be greatly appreciated!Steering_shaft_coupler.jpg

Dorman - OE Solutions Steering Shaft Repair Coupler 425-252: Advance Auto Parts

MOPAR PERFORMANCE STEERING PARTS (part #SP-867)