No, there was.
Long time ago for me, but i remember it as something that works.
Will it make a 1000s more like a 35 mm camera? No.
It will make it like a big 1000s even bigger, yet not requiring you to wind the crank. You can indeed Hold and fire with the right hand and focus with the left.
But why would you want it to be more like 35 mm cameras?