It is sad to hear that a set of dot matrix 6ks got ruined in transit. I have heard about many horror stories of 6ks being damaged when shipped. It is all about logistics when buying or selling something like these. There are very few new replacement parts for 6ks. Back when the glass was available, it was very expensive in excess of a grand each. You may be able to swap all the displays and boards out to make one good set of 24/96 6ks as you mention. As the firmware is the same regardless of the display, it should work out OK. I am sure others will chime in. I remember that depending on when the speakers were made there can be some differences in the silkscreening.

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