I recently got in on the Stargrave Nickstarter, and got the idea to paint up some space cultists. These came with the starter set for 40K for 7th(?) edition, so almost ten years ago, and had been languishing in the cellar since. As of yet I don't know if they'll be the pirate opposition, or form a gang of their own, but I suspect the former. Depends on who I play I guess.
The idea behind them is a former military unit going corrupt, so most of them have at least some clothes in "space camouflage".