Zinfizzlex's Portable Shredder Unit (Alliance)

Objectives
Master Engineer Zinfizzlex wants you to bring him the following:
 * Thorium Bar (30)
 * Mithril Bar (50)
 * Iron Bar (75)
 * Steamsaw

Description
I'm as anxious as you are to try out my portable shredder unit,, but before I can make the kit, I'm going to need materials - lots of materials!

To be exact, I'm going to need a mountain of thorium, mithril, and iron. I will also need one steamsaw per unit. You'll have to get those at the lumber mill.

When I was nosing around in here (before my capture) I noticed a pile of steamsaws at the Frostwolf lumber camp.

Rewards
You will receive:
 * +25 reputation with Stormpike Guard
 * +10 reputation with Ironforge