I have found one statue in the bottom section of the hangar in crows nest. It should be in the very back on top of a crate.
The second one I have discovered is also in Crow's Nest. It is in the Pelican Evac zone after the Barracks. You need to make your way to the room where all of the brutes are flying down from. there's a doorway which leads up there. The Golden Moa awaits you.
Another one was found in the room with the drones. it is between weapon crates on the far side of the cavern room.