Hasselblad Lens Part

Hi all, I am an American Photographer/teacher (from RIT) on a Fulbright in Zagreb Croatia for a semester teaching at the UofZagreb. My Hasselblad 150mm f/4 got jammed and I found a repair man, who really knows what he is doing to take it apart and figure out what it needs and it is just a small gear on a rod (technically called a Telescope bush part # 109950-0581-000). As he is retired he did this as a favor for me and will repair it if I can get the part. Does anyone have any suggestions???

Best & thanks,
Willie Osterman

Ask David Odess.