It's not difficult ot make your own.
Use stiff cardboard to make a template.
Get some 1/8" - 3/16" Al Alloy sheet, and copy your template - Voila
It can all be done with a handrill, hacksaw, vice, file, mothers, and the will.
Extra tip: Cover the Ally with a couple of layers of masking tape before cutting and bending the metal. Polishing is much easier and the results better without scratches.