With JTB Find you can find and replace text in the Extended Data tab in Properties, specifically for Property Sets and their Property Definition values.

For more about this app see our JTB Find page.

A trial of this product is available at JTB Find Trial. Uninstall the trial before installing the purchased product.

Elevated user privileges are required to install this product. 

Note: This app uses a custom installer (and not the standard App Store installer).