If you have a PKT license, you could create a Product Template, and that should do everything you want here, including reseting the UUIDs.
Also, if you are using Save Management, you will need to open both your CATParts, CATProducts, and CATDrawings. Then save your CATParts and CATProducts, but not your CATDrawings. Then, after that save is done, you can save your CATDrawings. That way all of the links in the Drawings will be correct.