Via Remco Ploeg:
I found a great new tool to reghost Microsoft Sharepoint Portal Server pages:
Now you can easily reghost those unwanted pages that are being served from the database without needing to access the Microsoft Sharepoint Portal Server databases directly with Enterprise Manager, or installing any web parts. This simple desktop application can run locally on the front-end web server, or any other location that has appropriate access to the Microsoft Sharepoint Portal Server databases. The tool will present a list of unghosted pages, and allow you to safely reghost them with ease.
You can download it here