If you guys are that concerned about braking quality and safety then why are you trying to source rotors that have been unnecessarily machined (drilled) in the first place? Just get a quality set of blanks and be done with it. Either that, or spend the money on a rotor where all of this work is, for sure, done in house. There was nothing misleading about any of that correspondence; they plainly said that their rotors could come from anywhere in the world and then they get machined by a third party on top of that, which is enough of a red flag to stay away, if you so choose.

Low Cost / Form / Function - you can only pick two. Either that, or be prepared to pay the big bucks and not complain about it after the fact...