Here you go!

I used P-clamps to hold the flashlights, I bought them from www.mcmaster.com They have both bare metal and cushioned versions (say, if you want to clamp the lights to your handle bars instead). Just search for P-clamp.

At first I used a piece of aluminum plate for the bracket, but it has since broken (metal fatigue) so I replaced it with a steel L-bracket from a hardware store. Usually you find these in the cabinetry/shelving section. It was a beast to drill the holes in it that I needed, I had to buy a cobalt drill bit especially for this application...