Restoring a previous version of a site using strictly import/export feature???

Backstory: I work for a company who does Kentico content creation/management for a much larger company who hosts 50+ individual sites in a single Kentico instance. This company recently just made the move from Azure Cloud Services to Web Apps. This environment uses a dev -> stage -> production model, and we use stage to do everything that doesn't involve actual dev work (i.e. web part coding). Unfortunately, we had close to 60+ hours of content editing (document creation/deletion, page alias work, template work) on the staging server which was wiped completely clean when a version of production was used as the basis for all 3 instances (dev,stage,prod) after the Cloud Services to Web Apps migration.

The problem: We would like to restore the previous version to the new staging environment. We are able to access an old instance that has been left up solely for this reason. Theoretically, are we able to export the site and import it into the new instance to "overwrite" the current content? Are there any other methods used to restore a backup version of a site? Versioning was not turned on. Though in the export package, I'm able to see all of the pages and content within the document xml file. We were toying with the idea of parsing the XML export data and using that to generate SQL update statements to update the content field in the DB tables based on page ID. Does anyone have any experience doing something similar? Thanks.