When I wanted to learn this, say, 2 weeks ago, I just looked it up on Wowhead, got some hints as to where to farm in Zul'Drak, went there when I wasn't the right level, and it quickly dropped after about 10 minutes of farming.

So yeah, we can have a long post on how this is a rare drop and impossible to get, or maybe you can buy a BoP on the auction house, or you could have just linked to one of many WowHead comments that tells you where you can easily find it. It's really not that complicated.

reg VH every person in my guild got it while running it.

Three of us were questing in Icecrown the other night, and one of the manuals dropped off one of the Nerubians near the encampment, I lost the roll... but then 2 Nerubians later it dropped again and I got the hook up

As epic says it drops *very* often in regular Violet Hold. Dropped for anyone in my group that could use it in one run.

I finally got mine too, but damn if I can actually remember where I picked it up. I think it was in the Sholazzar Basin.

But I wouldn't be surprised if they eventually make this trainable for the next expansion.

The manual drops constantly in instances. I've seen it drop three times in a row from trash mobs. It's not rare or difficult to obtain.

This dropped for me in Drak'Tharon Keep. Also because my brother loved that dungeon for some reason, we ended up running it about a dozen times. As far as I can remember, this always drops off the mobs right before the first boss.