As far as I know they dont make a steel gear. You should at least find a new aluminum gear cause the center of the gear wears and lets the cam walk easier. When my cam walked back it didn't hurt the lobes or lifters and I installed a new gear with the cam in the car. My cam was drilled and tapped in the center which allowed me to use a power steering pulley installer to press the gear on after i heated it. It worked great without putting any pressure on the rear cam plug.
