first there are a few things you would need. these are all things that are acquireable around the house, or at the local hardware store for cheap. you will need a hose clamp(make sure it is pretty thick sideways), a 1/4 in. bolt and two nuts, washers, wrenches, a screwdriver, drill and 1/4 in. drill bit.
Step 1: Making the Mount
Step 2: Assembly Required
Step 3: Mounting It Up
so with the finished product, you should have a hose clamp with a 1/4 inch bolt sticking out of the side. to mount it, choose a spot on your handlebars, as long as your hose clamp can fit it. put the hose clamp on it for some grip so the mount wont move, put some electrical tape under it. tighten it down with the screwdriver. then it should be on there nice and solid.