I might have one of these I picked up in a warehouse raid. I think there were 4 or 5 boards, wiring etc. Let me know what it is worth to you. Give me prices for tested and untested which will determine the amount of effort I put into it.
I got some working Joust board sets plus other Williams board sets for $215 shipped in the US. All come with a 30-day warranty too. http://www.arcadesolution.com/pcbs.html