ECS is probably one of the better places to get rotors.
FYI, manufacturers only spec rotors to be turned at most once in their lifetime. The second it goes metal to metal there is enough material removed to put them out of a useable spec and become unturnable. Honestly, turning the rotors is always just a bandaid fix anyways. Brake lathes aren't known for their accuracy and in plenty of cases actually turn rotors in a warped fashion.