2-4-2 Columbia Parts Diagram?

[jviss]

Greetings,

I have just purchased a derelict 2-4-2 White Pass and Yukon Railway Baldwin Columbia engine and tender, which I'm pretty sure is the older generation version with the troublesome drivetrain.  (I haven't received it yet.)  It was a super bargain at $20, and I aim to put it into operation.

First stop, Bachman parts; darn, no new generation chassis available! 

Then I looked for a parts diagram, and I can't find one.  Does anyone know if a parts diagram is available?

Thanks,

jv