If I had the space I'd probably pull a little something together, but more likely diagram inspired rather than realism (I do not have the patience to design and paint such small things, especially if I want the precision.
Creating the parts probably wouldn't be too hard (we have a 3d printer, so I'd just have to learn blender), painting them would.
I have some lego, wooden and blue track, but those probably haven't left their boxes for quite a while.