Went back to the KTM supplier.. nice guy.. gave me my money back.

After some phonecalls I learned that the sprag from the late bevels would fit on the paso. Also I've read that the sprag from the bevels can be replaced with a rover part, no. 22A716 (actually a mini cooper).. Getting one this week and the outer diameter has to be altered to 65,5mm.. after this it should fit at last!
regards Léon