This one was posted here a while back and since nobody's posted it yet I'll do mine. All it is is a set of Maglite flashlight hangers from home depot (other places carry them as well) that are mounted below the glove box. 4 1/2" sheet metal screw drilled into the dash and Viola! easy access to your light the next time you break down at night. these things hold on tight so it doesn't rattle around or fall off, even out on the trail.
Click here if no pic
Cost: about 5 bucks. 25 if you are buying the flashlight too (and a mag is definitely worth the money). One of the best mods for dressing up the interior.