Binyomin, I have been trying to get a C5 for my Vibrandoneon with no luck. My accordion repair guru has tons of reeds but not one sounds like the one I need for the Vibrandoneon. Has anyone had any luck getting them? I sent Martin Muller but he has not responded yet to my inquiry. I don’t speak German so if anyone has contact with him and can get some information I would really appreciate the help.