Only if it's startlingly custom. Did these screens have some radical configuration? An ultra custom pinout connection that can't be refitted somehow? Even if Leica used some crazy space-saving design at the time, things like LCD screens have only gotten smaller and thinner and less consumptive. It wouldn't, I'm guessing (without knowledge of circumstance), be a staggeringly expensive feat of engineering.
These sorts of components tend to follow similar standards. It's just surprising, that's all.