If the rotors are just bent and don't vary in thickness, you can bend them back with an adjustable wrench and a little pressure. Get a dial indicator (for run out) and micrometer (for thickness variation) to measure them. These tools will cost much less than a new set of rotors. Stop bending them when you get to <.003" of run out; they will feel much more solid at the lever and the pulsing will go away.
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