Hello John,
Disc brake rotors should be products from Brembo, but I'm not sure.
In any case, you can no longer buy the original rotors, because they were produced in a limited series only for Brammo Enertia.
There are two ways to solve this:
1) get a rotor with the same functional dimensions from another manufacturer
Here I found a front rotor from Tourmax that could fit the Brammo Enertia:
https://www.moto1.nz/products/tourmax-japan-front-brake-disc-270mm-thickness-5-0mm2) make a copy of the original rotor by a company that manufactures rotors for motorcycle disc brakes
Here are the dimensions of the front rotor:
Outer diameter - 270mm
Inner diameter - 130mm
Thickness - 5mm
Pitch diameter of mounting screws - 150mm
Number of screws - 6
Here are the dimensions of the rear rotor:
Outer diameter - 220mm
Inner diameter - 56mm
Thickness - 5mm
Pitch diameter of mounting screws - 80mm
Number of screws - 4
Cheers,
Karel