The Siren Board

I figured it's too expensive to go out and search around for one, so I'm going to make a file for my friend to CNC mill. If at all possible, does anyone have CNC files I could use to send to my friend to mill? If not, could I have some blueprints to a siren? I don't care what siren type, just blueprints or a CNC file. Thanks!

I found this with a quick Google search: http://makezine.com/projects/make-37/cn ... aid-siren/

While I don't have any on hand, I can easily whip up a .CAD file if you gave the dimensions.