I am deep into the late game, but still have trouble shooting down silver tower for SG Coordinator with 3 4x avalanche devastators + tanking dragon. And I only saw 2 or 3 of them in a ~150 hours campaign anyway, so not like I have a chance to try again. I downed several SG cruisers and even battleships, but no there were no coordinators on them, alive at least.
So on which ships or missions does the Public Enemy spawn? I read they spawn on a "larger smuggler ship", I assume it's the round one with a ramp? If so, I have been going after them for entire campaign, and probably have over 50 assaults of that craft, and never ever had one spawn. Any other ways to get the SG code or any of those two as prisoners?
EDIT: no SG bases too, I only had academy bases for entire campaign.