Out of curiosity, have you tried your 'ribbon cable from empeg to display' idea? If you have (without buffering on both sides, induced spike and crosstalk protection etc), then saying 'the display broke' is similar to saying 'the display developed holes' after you shot it. There was a post here about properly done extension. IIRC, its cost was higher than original empeg's....
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Dragi "Bonzi" Raos Q#5196 MkII #080000376, 18GB green MkIIa #040103247, 60GB blue