Mike, the beacon is home made. It is a 5mm white LED that I cut down, reshaped and polished. The metal base is a wrap of aluminum ducting tape. I use that stuff for all kinds of things!
I have seen Aaron's beacons, and they very cool. I have all of the materials to make a similar beacon, but haven't braved it yet!
I use finger nail files to shape and polish plastic. I get them from Sally's Beauty Supply.