> We could hire someone to build the PCBs and, maybe, even solder the
> components on them. Does anybody know the schematics of the board?
> Would anyone "donate one to science"?

I've got a memory-expanded z50 that isn't doing much at the moment.  I
think I could donate its DIMM to the cause, if I can get either it or
an equivalently functional module back someday.

If somebody wants to get started hunting for chips, the ones on mine
have the following printed on them:
NEC SINGAPORE
D42565165G5
-A60-7JF
9909EE005

Brian