HI and looking for resources for a Mercury trade stimulator

[Fortytwo]

Hello,
I just joined the forum, long time pinball and EM arcade guy. I currently have a mills vest pocket repqinting the case and I just picked up a groetchen Mercury trade stimulator.
The issue is someone once started working on this and gave up. I only have a few parts and would like to assemble it again. What ar some good resources, parts, and diagrams. I don't want to spend a fortune but would enjoy restoring it.
Thanks
FortyTwo.