(Bushnell the gnome here) The war supplier in Ak'Anon is Tinkerer Sprocketsnik. He asks you to go get parts from Izibat in Shadowhaven, who is in the building with the library, right next to the library. Izibat says he wants robes (he sells robes). He gives you nothing back for his own robes, and gives back anything, like a tunic, that does not say "robe," even if it says "robes." For most kinds of robe, he gives you a Polished Alloy Cog. For a Robe of Benefits and Flowing Black Robe, he gives you an Imbued Sprocket. Robe of Enshroudment, Blackened Crystilline Robe, and Noble's Robe yield A Bundle of Parts. Ghostly Robe yielded a Tempered Spring. Siren Scale Robe yielded a Coil of Wire.
I have heard a rumor that the war suppliers can give a 30% exp potion. I tried giving various combinations of the five items to Sprocketsnik, but the only thing I got was a dark elf illusion potion. Usually he only took one thing, gave the rest back, and only yielded faction.