pjg wrote:Would rather use sheet metal, I can make one if I have to.
If you really must have a shelf just like what came with the same back in the day, I'd call Boston Lock & Safe in Brighton MA (oldest locksmith in America and really nice guys too) and see if they have anything kicking around. This isn't going to be a common item you can get at just any locksmith or hardware store, due to it's age.