I know nothing about the game but being an Exidy game I know they changed as little as possible on many of their games over time. It's possible a PS from something like a targ might work or even basically be the same as what you need. Personally I'd look into it.
Problem solved thanks everyone who posted. The power supply is right next to the monitor chassis. Who knew... Guess I get to be the dumbass of the day. Circus is up and running!!