sounds like a cool project, I know a little about this stuff my self, and I've done a little schematics aswell. As for locating the components, I'd suggest going to a a radio shack if your in the states or canada, they carry tones of switches and wire there. AS for the oscilators, not sure about that. Let me know how you get on with this project.
I'd also suggest posting this over at DCemulation.com, you might get some better response overthere, seeing how its a dedicated DC only site.
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