It's been many moons since I've left the Plane of Innovation trying to get the junk beast to spawn. From Alla, it looks like he's a random spawn from patroller's around the starting circular junk area. In the past, I felt like this dude was always up in live wrecking groups fighting here who were randomly aggro'd. I must have killed the circle 20+ times. My group of 65's all have gained roughly 30-40 AA's (actually, kinda cool). Any help appreciated, I know people said they have killed him on this server so I might just be very unlucky or am I missing his spawn trigger?
http://everquest.allakhazam.com/db/npc.html?id=10122