Here is a photo of my Maltron with the unique layout. Notice the location of the modifiers, parentheses, brackets, slashes, It was a layout they made for a short run awhile back, but the new Maltrons do not have this layout.
I have considered getting rid of this keyboard so many times to make a few extra dollars, but every time I start typing on this board, I fall in love again. This layout is pretty impossible to find unless you get one of those programmable Maltrons.