I found a somewhat effective trade route in UIN space : Buy High tech components in Achilles and sell them at the Shipyard in Gianopolis, then buy weapon comps in said system and sell those in Achilles. Rinse and repeat
Also, a couple things for Okim :
In the Achilles system, the civilian base sells low-tech components which you can then sell at the security base orbiting the same planet. Is this intended ? It's very very easy to just buy a couple of micro freighters and grind that route till you're a millionaire.
Also, I'm getting many .null errors (the error screen didn't give me more info about them) when trying to access "more trading options" in several systems. SO far, I've counted the stations at Nexus, Centronom and Centauri, and the shipyard at Gianopolis. Oddly, the .null errors seemed to be more frequent when a Jolly Roger was in my hold.
Hope this helps
As a side note, I've had the possibility to play your ACM mods for both Aftershock and SOTS, and I got to say they're pretty much the best there is around. SOTS+ACM is probably the most fun I've ever had in a sci-fi strategy game !