Does anyone know where I could get a diagram or picture of Gomez's train layout?

A list of episodes that featured it?
(And are those episodes available for purchase?)

Or who built it for the one time they filmed it, (and if they're still alive)?

Or who has it, assuming it wasn't destroyed after the show with it was filmed?

Thanks.

No I don't but did you ever notice (you only would in daily sindication) that they only filmed the wrecks once, and just recycleed them?

They are always in close up, the shots with the characters only had a bit of smoke rising and if you freeze them and look the wrecked cars aren't even in the same situation, if noticeable at all..