Yes. Rotors can be trued by hand. There are undoubtedly tutorials on YouTube on the subject. There's a special tool that isn't necessary if you have a small crescent wrench and a steady hand. You do it with the wheel mounted. Work slowly and carefully, thinking about where you place the wrench jaws, the deflection that you'd like, and how much/what direction the force of the wrench. Re-measure often. It's not hard.