I had one, and of course wished to make it work... though I am far from one of the genius guys that knows about things. But from what I remembered it was nothing much like other keyboard PCB I have seen. It was complicated and had lots and lots of extra chips, more than some old motherboards do! The traces for the switches were pretty convoluted too, broken into several sections of 12 if I recall.
It would probably be more feasible to have someone design a new PCB that would fit inside the casebody with the same physical layout.