disc brake wheel stud swedge tool

If your asking about the 65-72 Kelsey Hayes, 4 piston caliper, disc brake system, you don't need to cut the studs, like you would need to do with DRUM brakes.
They just press out, separating the rotor, from the hub.
As another stated, a BFH works too, by putting the lug nut back onto the stud, flush with the threads, and whack away.

The fact is, the only way they came from the factory was "swedged" studs. If the rotor has been replaced then there is no "swedge", and I would not add it either. It is just something to be aware of. The poor guy in Australia probably would preferred to cut the "swedge" and easily hammer or press the studs out of his original hubs. I grew up with these cars, and in the beginning rotors were not sold without the hubs and "swedged" studs. There are probably few hubs left original, but it is worth mentioning. There probably is a tool to "swedge them back, but like you, I don't see any advantage.