Possibly. But they still have to earn it. It won't be randomly dropped. Just because someone tells you how to earn it doesn't mean you didn't earn it. You still need to complete specific tasks.
Whereas the gally it's complete luck.
Ya, I don't know if you play gta v, but in that game, you can go around the map to pick up spaceship parts, and once you get all [b]50[/b], you get a special vehicle. The parts aren't that hard to get and anyone, like I said, can just look them up.
This is what I think the sleeper stimulant parts will be like. However, like you brought up, they could be obtained via a tough challenge in the dreadnaught, and even if you know how to do it, it may be difficult