If you are able, take a front wheel off to take pictures of any casting numbers on these rotors. Look on the outside, the inside, and the outer circumference of the rotor.
Finding the rotors would be more difficult than the pads. Once you have the rotors on hand, disassemble the brakes and take the pads to any big truck parts supply house. They should have them.
You might even get lucky and find a part number on the pads.
Another thing, sometimes there is a small plate attached to the outside of the rotor hub. Remove the hubcap to see if you get lucky there.
Part number plate glued onto my rotor.