Well not exactly true about the Tundra but Azjol is a good place to farm too.Provided you have good gear or manage to get someone to help you.

Hellow to everyone,
This is a video I made to show a tip about an easy place to farm the annoying Borean Leather.Check it out and I hope it helps.
http://www.youtube.com/watch?v=1u2sxrEkuBM&feature=plcp

Hello, There seems to be a quest giver in Shadowmoon Valley named Ancient Shadowmoon Spirit who gives 3 quests: Divination:Gorefiend's Cloak ; Divination:Gorefiend's Truncheon ; Divination:Gorefiend's Armor. However only the first quest (Divination:Gorefined's Cloak) is marked as bugged in the quest...