ebay.com link: MARS MEI AE2611 U5 fully refurbished 115volt takes 1 New 5 00 10 20
This man sells rebuilt ones that look like new. And will replace 500 count cartridge on it for a 300 so it will fit in your game.
It is 110AC, so if your game is 12 volts you need the Stern harness to plug into power supply in rear, or one of these :
https://na.suzohapp.com/products/bill_validators/42-7057-00
LTG : )