This quest is not available in game.
Take the copy of Goodsteel's Ledger and then find the items listed in it before seeking Krinkle Goodsteel in Tanaris.
Oh, you know what? That reminds me.
You wanna finish up a little job I took up while I was in Tanaris? It's easy...
Krinkle Goodsteel in Gadgetzan was lookin' for some stuff found here in Searing Gorge and a few other places. Maybe you could take a look at the list and then bring it all to him?
I'll just slide his ledger under the door if you're interested. Take that, and the stuff he wants back to him after ya collected it all.