There are clubs and people all over the United States (often in rural areas) dedicated to building home-made steam powered machines and vehicles.

Unfortunately, these real-life steampunks (not cosplay kids) usually also would rather spend time working on their projects and not documenting them, so there's not very much on the internet compared with the number of people active in the hobby.

Keep an eye out at county fairs and small town carnivals and rodeos. They usually show up.