I was also going to recommend dafont - useful place. Here are some other links that might be interesting;
http://hans.presto.tripod.com/fonts/stencil5.html
http://www.simmerspaintshop.com/forums/dlcat-military-fonts-19/
http://cs.finescale.com/fsm/tools_techniques_and_reference_materials/f/20/t/19581.aspx