Thank you FrankiE90 for this mod.
I recently got the bracket, sanded and painted it black and mounted it under the bumper just like you suggested with the self tapping screws. I actually still used a drill to make a pilot holes, made the install a whole lot easier and faster.
You cannot see the bracket at all and it's very sturdy! Furthermore I went to the hardware store and picked up a couple of thumbscrews to mount the license plate on/off quickly; without the need for any tools and in a matter of seconds. I lined the back of my plate with duct tape to prevent scratching, works great. I'll post some pics when I get a chance.