I'm not sure exactly what you're proposing. Are you saying an export of the entire database, including code, home nodes, passwords, etc? I don't think that would be a good idea.

The Everything engine can import and export what are called "nodeballs". If you have a certain set of node_id's you want, gods have expressed willingness (in the context of pmdev) to create nodeballs of them. I can't speak for them, but they may be willing to do the same for you if you ask nicely. Of course, it would have to be a reasonable-sized set, with all the usual caveats about security, available time and resources, and so on.

Or am I misinterpreting your question entirely?