I'm not sure such a mod would be possible if the minor factions such as Clown or Church are randomly added at outpost generation time. I'm also not sure if the random seed defines the stations or just the level landscapes and enemies etc.

How would the information be conveyed to you even if it was possible to know what's in a station? It would probably have to be on the map, and I don't recall seeing map mods.

I suspect there may be a few hard-coded locations where these minor factions have unique quests, probably known by station name and possibly location too, same as for the Toblerone Report or whatever it's called, the quest for the Seperatists.