Colorsource spot detailed parts diagrams and list

We have Colorsource Spot with a Zoom barrel that has a broken part inside the barrel that keeps the lens fixed in plane as it is zoomed/focused. I have no idea what to call that part so as to get a replacement. Is there a detailed exploded diagram of parts internal and external for the colorsourse spot zoom that I could access to help diagnose the problem and fix it?

Thanks in advance