I picked up a foam head and a face looking cover for $ 7.00 at a wig and costume store. I used it for a portrait class with lights. You can see the images here: http://www.flickr.com/photos/5337685...7627769252618/ I got a woman and a man one at $ 7.00 each. Worked well and the instructor, a fellow hippie from my Flower Power days commended me on my friends I hang out with and posing for me.
Hope it helps.