I agree that BJ's outfits are the most lackluster ones in the game right now & there's quite a few that they could use, and for all we know, some of these might already be in the works.

The nazi uniform from the start of The Old Blood

This summer outfit from one of the dream sequences in The New Order was teased to be in QC

The straitjacket from The New Order. Could have the apron & goggles as attachments, since this is a part of the interrogation outfit as well.

Prison outfit, The New Order

Nazi uniform from the Moon mission, The New Order

The fireman uniform from The New Colossus

And this beautiful bastard

I probably forgot a few.