Thinking about the Armstech schematic possibility and the way they can be acquired now in 1.2 from Reverse Engineering "orange" items, it actually would be best if there was a repeatable quest that awarded the A-300 (one of my suggestions above).
Not only would it allow any Smuggler to acquire the A-300, but it would also allow Smugglers with Armstech a way to acquire the A-300 and RE it repeatedly until they got the schematic (naturally, the A-300 would have to be RE'able). That would not only allow them to make it but if they crit it to sell it with an Augment slot.
The best of both worlds!
Now if only this becomes a reality.