Actually you don't need any fancy brackets. Go to Home Depot and pick up a couple well nuts (http://www.calsci.com/motorcycleinfo...s/WellNuts.png
). I don't remember the right diameter exactly, but they're super cheap. Try a few out and see what holds it. Also for this you would need to drill holes in your plate (since the bumper holes don't match US license plate holes), but that's better than drilling the bumper.