or get one of those plumber type hangers, not sure what you call them, they already have little holes in them,,not a clamp but you could probably put a small bolt thru them,, I used them on my rear lic plate to hang the topper plate, check my website, I cant for some reason post it here by its self

Redryder pix
My Hotrod
A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of "up to and including my life."
I am fighting cancer and I am winning the fight | Pain is part of life; misery is an option.