Look at Neals brackets in the HAMB thread...they are sort of a shortened version of the early '32 brackets, and if you need a head start on making them there are commercially made muffler clamps very like that...also available as parts brackets for motorcycles.
You want to lower the thing greatly, I assume, and something like that could hang the plate overlapping the front bar and as low as you care to go. Anything other than stock will leave you without ready access to the hand crank, but should be readily removable so you don't have to call AAA like a soccer mom when your battery dies.