A picture is worth a thousand words, so...
Similar idea but THIS one will actually work!
The bottom bracket is an L-bracket bent into a J-bracket, which is attached to the frame to secure the bottom of the chiller.
The upper bracket is a length of metal that has a 45 degree bend on each end with the distance between the two bends being slightly longer then the width of the chiller and the height of the bent ends extending about 1 inch beyond the depth of the chiller. A hole is drilled in each of these end sections to receive a threaded bolt, washer and nut that secure the chiller. These holes should be drilled so that the securing bolt will run against the surface of the chiller's face.
You then will secure these brackets to your stand by welding or bolting or whatever way you feel is best (duct tape is always an option).
If you steal this idea
and make profit off of it without my permission
BAD THINGS WILL HAPPEN TO YOU! Remember, I am the Brewpastor, I have connections! You are of course welcome to make them, use them, and give them away.