Thanks for the great tips. I do have the LCD data sheet, but I figured the 8020A schematic was unobtainable. I will scrounge a copy, or use the generic ICL7106 pin-out to work out the details. The LCD fits everywhere except the bottom pins, so I will either drill holes for them, or mill off the bottom edge of the holder. If it is too thick to allow the factory cover to slide in, I will probably try using some thinner plastic sheet to make a new cover. The Fluke piece with the painted mask is 0.130 thick, so I have some room to fudge, and I will no longer need the exact pressure on the LCD that Fluke needed to make the elastomeric contacts work, so if I can fit it in it is sure to work.
I kind of wish everybody made a mirror image version of their IC's, because it would save me when I print and etch a PC board backwards!
Thanks again,
J. R.