Indeed, that seems to be pretty much it, though still tricky to find ones with screw lugs on the back.

In any case, I'm not gonna bother with it, if I really need to do a patch-panel I'll make my life easy and switch to RJ11 or even RJ45 just for the cheap widely available patch cords - I don't care if it's 12v DC, copper is copper.

Speaking of things that don't exist but should, what about a plug standard where the female is literally a pattern of holes and pads on a PCB. So making a female costs you nothing except PCB real estate.