There is no practical repair for the display itself.
Though I never came across any such damage at any camera body so far, only at one data back. But I experienced one display at a meter from a different field disintegrating completey within 10 years. In general my experience is that such fault is rare. But likely it is the fate of any LCD Display.
"is there any hope a replacement panel can be found for repair?"
The camera model is not really rare. So sooner or later you may find and beaten sample to salvage. I do not know how deep into the innards you must go to resolder the connections. Keep off any foil leader connections directly at the LCD, as hampering there can form another fault...
Unless that deterioration is not model of display dependant, but pure erratic, you may soon experience the same fault at your replaced display. But as indicated I lack experience in number to say whether such fault is actually model dependant.