I believe our new overlord owns an airstream website.
Just as an FYI, all the old airstreams and similar trailers I looked at needed extensive wood repair, consider expanding your search to a fiberglass trailer or a popup. I ended up with a trailblazer pop up which is really neat, but I am never going to use it. Also, old airstreams are not suited for any sort of "overlanding" IMHO. I know some people do it, but the construction is not really up to the task.
They are really neat though!
*not legal advice*