Any source of 20 inch DRO units?

Hi folks,

I know this isn't true homebrew, but Cal Aero no longer has the $99 20
inch digital scale for machine mounting, and these are no longer on the
Wholesale Tools site either. I can make do with a 12 inch unit, but the
20 inch unit would be nice. I have several of the old Goldmine units
with the 1000 count wheels and HP encoders, but have no room for a CRT
or even a flat panel near the mill! The encoders will get used on one
of the machines, using the mounting (Thanks to Art Eckstein) and DRO
software (Thanks to Steve Lindey), just not this one.

Does anyone know of a supplier that still has the 20 inch units
available? I can always get a long digital caliper and mount that if
these are no longer around.

Thanks,
Stan