Does anyone know if there's a bulb from radio shack or some other company that will work with the scorpion but give it the runtime around the same as the UKE 2L? There's a hunting store that sells the scorpion here but the 1 hr runtime would not be too useful for running around at camp or a hike. I really like the build quality of this light and just wondering if there are alternative bulbs that would work with this? thanks,.