Getting exclusive items

Hi!So I played for an entire day and got lvl 70, I did almost every quest but I had to stop on the mithril golem one, cuz I couldnt find him, is there any other mithril golem besides the one in kalm?And I only managed to get 4 itens from bali, and I dont even know where how I can get the itens from lothorien.So please, can someone help me with all that? Thx

The golem is found in a cage in the central islands. The golems that wander from the farm all the way to the northwest part of the map randomly drop the key for that cage.