check with Darell from slots4homes, he had some of these at one time. he may be able to help, if he does not have any, you could find separate power supplies that will provide the voltages needed to run the machine. that's what Sigma did in there first games. you will need +5 vdc, +12 vdc and + 24 vdc.
I would have to look at the schematics and get the correct color wire versus the voltage, I think red is the +5vdc, orange maybe +12vdc, yellow maybe +24 vdc. Marlin P Jones is a good source for power supplies (Florida) probably could find one that provides +5 and +12 in the same supply!
Hope this helps.
Jim