Rear License plat option with no bumper?

[Zumo]

I recently removed my rear bumper witch resemble those that use to be on late 80s and early 90s model F$#d truck. The PO welded the brackets as well as bolted them on there. I had to use what I had and grind the welds down the best I could with my grinder and bent them back and forth and got them off. Anywho I cleanned up the welds and painted.

Now how do I mount my plate? Not in the rear windows guys. :P Is there a bracket or a kit? Anyone h ave pix?

Thanks