Easy, Underhive Pit slave.
escapes his master after beating well the biggest and hardest pit slave anyone else has to offer and wanders into the wastes outside a hive where no human without serious atmos gear would dare but to a hardened ork "its just a bit ov wevver!"
would work well that. just think imported illicit items from the elite rich.
heck it would work on necromunda they'll be seeing orks pop out the ground for years to come!
Edit: i mean armageddon