On every horde character I've had, as far back as early vanilla, I got this item that starts the quest. I've completed this quest on horde several times on retail vanilla, but I can't seem to get this item to drop from Westfall on my Horde character in Nostalrius. I've spent maybe 5 hours 1shotting murlocs (maybe 2000-3000 murlocs killed) and still no Treasure Map drop.
Does this item drop for Horde on Nostalrius (or any faction for that matter)? If not, it should because it was available to Horde on retail vanilla.