I've seen no mods that add more miners, administrators, etc that are alive to Peragus. All you have are the Sith near the end of the level.
Originally Posted by DuckfromPortal
Are there any mods that make it a revisitable area with people or something?
You mean after it inevitably explodes?
All the mods I've seen for Peragus were mostly cosmetic in nature.
If that interests you, you could try these for a start:
A Darker Peragus [2.0]
Peragus Tweak 1.2
Improved Peragus Asteroid Fields 1.1
Peragus Sith Troops To Sith Assassins
Peragus Large Monitor Adjustment 0.1
Replacement Peragus II Artwork by Trench 1.0
Maintenance Officer Realistic Reskin 1.0