Abus 83 Z-Bar

Does anyone know where I can find Z-Bars for the series 1 83's? I have looked everywhere with no luck. I can find the s2 ones but, that is it.
I have 20 locks without them that I would like to put them in. I currently have 2 and have thought about just trying my hand at making some but, buying them would be more convenient.
Or does anyone know what the difference between the s1 and s2 ones are? Can the s2 be modified to work in a s1 83? all the information I have found just simply states that the s2 Z-Bar won't work with a s1 83 but, nothing on why.
I have 20 locks without them that I would like to put them in. I currently have 2 and have thought about just trying my hand at making some but, buying them would be more convenient.
Or does anyone know what the difference between the s1 and s2 ones are? Can the s2 be modified to work in a s1 83? all the information I have found just simply states that the s2 Z-Bar won't work with a s1 83 but, nothing on why.