I'm confused. I have waited over a month in New Vegas, and I still cannot find the Katana or Embrace of the Mantis King! ...
Anybody have an idea? Mick and Ralph are both dead and Cliff Briscoe is dead. I am level 50, the biggest collector there is :hubbahubba: and don't want to start over. :sadvaultboy:

Keep checking the remaining merchants. That's the only advice anyone can give up.

Well, unless you're on the PC, then you can just use player.additem xxxxxxx.