70 Dart Kelsey Hayes rotors

Back in the dinosaur days of the 60's and early 70's, the way that you purchased a rotor from the Chrysler parts system, it came with a hub.
The aftermarket parts, as far as i know, and remember, never sold their rotor with a hub.
You had to press the hub off the shot rotor, and put the hub onto the new rotor.
For years, back in the old days, you couldn't get replacement rotors for these Kelsey Hayes disc brake system, as none of the aftermarket parts manufacturers were making them.
Then all of a sudden, some foundry started making them again, and Wagner, Bendix, Centric, bought them, and then started selling them under their name.
Back in the day, i bought lots of these brakes at the Pick-N-Pull wrecking yards, when parts like this were find able on wrecked cars.
And at one time i couldn't get any rotors for the systems that needed rotor replacements.
Now a days, rotors are pretty much obtanium, until an ocean boat gets a load of them from China, to some port, here in the USA.
Then all the parts vendors, will have rotors, back in stock again, but who knows when that's gonna be?