Trading towards A7 thrusters

I now have an A5 frameshift drive which I found by looking for a 25M population High Tech system.

I had 3 C3 gimballed beam lasers but sold them in favour of a A7 power coupling. I just need now to get some decent thrusters and this C3 beams or possibly a plasma accelerator and 2 C3 beams.

I traded the beams in because:

I MUST NOT FLY WITHOUT INSURANCE

Anyway I've left Bacon Port and Giese 868 because I can't face those arms after what they did to my Python.

I'm now trading Palladium and Progenitor Cells netting around CR2300 per tonne per round trip.

My method for finding this route is find:
High Tech (for progenitor cells) and to sell Palladium
Agriculture & Extraction Economies with height population and looking for the port that exports Coltan / bauxite... rather than the agricultural port.