not sure about your budget but have you had a look at http://www.david-3d.com/en/ maybe not so easy to use / setup but if you have a beamer and a webcam already then you just need the software
not sure about your budget but have you had a look at http://www.david-3d.com/en/ maybe not so easy to use / setup but if you have a beamer and a webcam already then you just need the software