My main hunter took part in a massive turbo kara run tonight. We steamrolled through: Attunmen, Moroes, Maiden, Opera, Curator, and Shade before I left.
The crossbow dropped off of attunmen, the opera dropped the beastmaul pauldrons, and the curator dropped the T4 Hunter/lock/Mage glove piece.
Shame they're a downgrade from Merciless Gladiator for my build.
Oh well, keeping them anyway.