Any existing plugins for transferring data from private to public Omeka?

We are developing a virtual machine for using Omeka offline, and would like to know if there are existing plugins or tools for pushing up work from an Omeka instance in a local VM to a publicly accessible Omeka instance. The Omeka API Import plugin seems to require the source to be accessible by the target, which isn’t the case. Would we need to develop a new plugin for this?

I think that the best option for these situations is to dump the whole database and copy files from the test VM to the production server and then do any necessary changes.