[Techtoolslist] Hewlett Packard 54120B 20Ghz oscilloscope

[Ness and Steve]

Hello,
I was wondering if anyone out there has any experience with the above osciloscope.
My setup includes:
54120B Mainframe unit.
54122A Test set.
What I would like to know is of there is a probe that suits this monster or if they were generally used with custom cabling. I have the manual but couldn't find a reference to any probe.
Many thanks
Steve