The problem in finding replacement glass, assuming Sencore has in fact stopped supporting the old gear, is in the display annunciators that were very likely unique to Sencore. Before I left Sencore, I do know we were always defining custom LCDs for any new product - it was just cheaper and easier to come up with a professional-looking front panel that way, as compared to a generic numeric display complemented with some sort of backlit annunciators. I don't remember the tooling cost being that bad for the custom displays, at least not when that would have been spread across a production buy of say 500 displays.
The 6-digit display on the left includes WAIT, OPEN, SHORT, pF, uH, uA, (M-ohm), uF, mH, mA, (K-ohm), RINGS, V, %, (ohm) GOOD, and BAD. I doubt that can be found in any off-the-shelf replacement. The 4-digit display on the right at least only has VOLTS.