Can you still get them?
This was from 4 years ago, so take it with a grain of salt, it may not be viable info now.
The bpc’s can be an item from the Strongboxes that drop from the npc mining haulers in the npc mining fleets.
Still true , but low odds of getting one when you open the box
There’s this group called Safety. that can sell you some if you need . They have all kinds of mining drones and gadgets.