Yet you know that under Lex Mercatoria and the doctrine of Differential Development,
>>5823886the Isonomy strictly limits and constrains the distribution of tech - to the extent that many planets remain feral and primitive enclaves on the edge of famine. The Isonomy claims this is to maintain galactic Unity, to prevent the turmoil and arms race that would ensue if every primitive planet / colony suddenly acquired civilisation-threatening tier armaments, and challenged the rules-based order. Drone advancement would be one such technology...
You could legitimately purchase some version of drones either openly or in a clandestine manner, from an available nearby star system or trader.