[R-390] Coaxial cable test leads

[Jim Temple]

I am in the process of restoring a couple of HP 410C's that I got for parts.
The test leads are either damaged or too short.  I have not been able to
find a source of this coaxial cable test lead, which is hardwired into the
instrument.   The color is red and gray.  The size seems to be about what
RG-174 is, but this is only available in black.  I know I can probably use
RG-174 (if it is appropriate for test lead use), and use probes of the
appropriate color, but I would like to find a source for the REAL THING.

I have tried many web sites and have even called HP, who no longer stock
this coaxial test lead cable.  Anyone have any clues or advice on where this
can be obtained?

Thanks.

Jim Temple