Since there aren't really any models for the Chosen I decided I would use Night Lords models since Chosen can infiltrate. I ordered a set or two of the Night Lords bitz pack and modeled these guys up.
I painted them a bit darker than my regular troops but they still fit in because of the dark blue/purple color and the gold trim.
I haven't got to use these guys very much yet but I am planning on modelling up a few more and then unleashing melta fury upon my foes.