Ouch. I'm sorry for your loss @CBuckwal: in short, no.
It's a longshot, but since yourdomain.my.workfront.com has already refreshed into yourdomain.preview.workfront.com and yourdomain.sb01.workfront.com, you might find the old data is still in yourdomain.sb02.workfront.com (if it exists), in which case, bullet dodged, lesson learned, etc.
For future consideration, I invite you to consider using our Workfront Snapshot solution (and/or our Document Extract solution) to take periodic backups of your data, and/or our Packages solution for more targeted extract-and-restore situations.
Regards,
Doug