Re: Any elite Aurochs for pristine leather?
No. Turbine took them all out of the game. They used to live in Trollshaws, Misty Mountains and Angmar. The problem is that the elite Aurochs shared the spawn generator with normal mobs that we needed to kill for quests. Eventually the whole area would turn into Cows and Bulls. You would have to leave. You couldn't kill these elites at level with a solo character.
The customers complained loudly about all these solo quests that had to be done in a group. A group was required in order to kill the Cows so that Bears or whatever you needed would spawn.
The choices are to go Trollshaws to the wolf den. Or to the bear habitats in Trollshaws. There are no bears that drop those hides in Lonelands. I do not remember seeing any bears in Lonelands.
Unless stated otherwise, all content in this post is My Personal Opinion.