This guy spawned in front of the short hallway to the exit. Was DB to a 55 Shaman. Dropped the ring for me. Very nice upgrade. If there is a place holder at that spot it is the guard spot to the right as you go into the exit hallway.
Confirmed, was in the hallway leading to Disco 1 (just after the bridge). Killed it twice yesterday night, dropped the ring twice. LB to my 59 PAL, easier than all other LB mobs in the area, less HP i would say.