Have you looked into Firebrand Enterprises? I’m not a member, but I’ve seen them around a fair bit. Their longevity speaks for their activity, no doubt.
I’m not sure whether they’re black market or just corporate in nature, but might be a fit for your character?
https://us.forums.blizzard.com/en/wow/t/h-rp-firebrand-enterprises-still-hiring/552079