Copy and print the photo in this auction of the side plate without the handle.
With this and dimensions, a metal shop will be able to make up 2 similar pieces and bend some handles. I'm thinking they would punch several of these out of thick sheet metal and weld them together to create desired depth, then add a solid backing plate.
MoonDawg, got it saved, I come across some that were close and had three holes, I just may order them and weld and drill new holes to match the original.