Just to clarify (as I just finished this one two days ago), you need Hunter's, King's, Noble's, and Trapper's idols to get the bracer. The Hunter and the Noble don't appear to have placeholders, but the King does (his spot is obvious - the throne - his placeholder is an elder) and the Trapper does as well. The trapper was impossible for me to find after guessing at placeholders for a couple days, and finally someone clued me in - there is a big mound of dirt between the throne room and the zone to Bancok mines - the trapper (or his placeholder, which will be some random kobold) sits directly on top of the mound.