I'm curious if anyone has considered reproducing these boards and what the demand might be. Judging from the schematic in the manual it shouldn't be that hard to lay out a board and have it made. That assumes that there are modern equivalents for all the parts used.
From what I can tell in my fuzzy schematic copy it lists:
- DA1704 diodes
- X16A5332 transistors
- X1FA5332 transistor
- URL1D6005 op amp (?)
These may be Chicago Coin part numbers but a little detective work might reveal more standardized part numbers that can be cross referenced to equivalent parts.
The rest of the parts appear to be generic resistors and capacitors.
/Mark