1. Retinus the Seeker - Vale.It's in Uldum.2. Vil'thik Hatchling - Uldum.It's in the Vale of Eternal blossoms.3. There is Yiphrim der Willensräuber in Uldum. He drops Einfache K'thirverkleidung.
A word of warning, don't be like me and think you can breeze through Durch Blut und Dreck und Knochen by rounding up large packs and aoe'ing them down. A lot of the mobs involved drops a nasty, stacking debuff ( Animainfusion )on you that reduces your hp by 5% per stack, and it stacks faster than you think. I saw a tank starting out with ~600k hp get reduced to about 30k hp, at which point the other stacking DoT the mobs put up ( Animaausbruch ), quickly becomes lethal.