For the mannequin, how about making a duct tape copy of yourself? Easy, and simple, just buy abouf four or five rolls and a cheap polo T-shirt, have someone tape you up evenly, and then fill the cavity with newspaper. Easy copy of yourself, with which to accurately see how the items look on your self. You can even do supports there, and make full body version. I have a torso version of myself to help me on my work.