Importing data from Open Web Analytics?

I recently switched from OWA to Piwik, and I’m looking for a way to import my data from OWA to Piwik. Is this possible? I see there is a way to import from Google, but I can’t find anything to import from OWA.

Thanks in advance!

There is no existing tool to do it, but it should be possible with custom work (if you wish to sponsor such script get in touch)