not sure if the original poster is still looking, but there are wall mounting solutions for projectors that could be used on the beam, such as this one -
http://www.vogels.com/web/Consumer/Products/Products/EPW6565-PROJ-WALL-SOLUTIONC.htm
http://www.vogels.com/web/Consumer/Products/Products/EPW6565-PROJ-WALL-SOLUTIONC.htm