Looks like only nine(?) pins need to be implemented on the Adapter PCB. Throw on a few spare ground pin connections because you won't have a solid shell ground if using a printed mechanical interface.
I have similar plans but for ADC first… Not even sure I have a machine with this connector anyway.
As for pins, it's possible to find bare pins by 100 instead of rows which won't have the pitch required. Worst case you'd use two layers of PCB to keep them aligned and straight.