Zungam is in a hut past the first Lynx pulls as you head toward Halazzi. He is chained until you reach him and release him. He then walks down the stairs to the first floor of the hut and becomes a repair vendor.
He is involved in the following quests:
See Zul'Aman NPCs.
Patches and hotfixes
Patch 2.3.0 (13-Nov-2007): Added