The starter plate on a Demm is a little special. It has the friction material directly mounted to it. Luckily the shoes on a Demm clutch have friction material on there sides allowing you to use a plate that doesn't have friction material on it. A Puch starter plate will work but you will have to modify the locating pin for the roller bearing because the Demm crankshaft doesn't have an opening for it to go into. A starter plate from a Benelli should be a direct replacement and it even has friction material already installed on it.
Here is a Puch starter plate on the left and a Demm one on the right
And here is an angle shot showing the height difference between the two.
