I have considered that path as well for my Rejuvenator,
a more
reasonable prospect since there are only 4 chips involved (1M x 16
total), but for the cost of the small boards, I never pursed it
further.
At least it's only about 80 joints.
I'll look for some schematics of it, maybe a 4 x 32 72-pin SIMM can be
used, AFAIK there are 4 separate CAS lines
Or, if it is 16 bit, you can use the same 72 pin simm in half :)