Stylist Style Copier

From ProductivityApps:

Stylist Style Copier copies styles and paragraph numbering between any two Word documents that are open on your screen. Style Copier checks to make sure that all settings needed for automatic paragraph numbering are copied as well as based-on and follow-on styles. Style Copier is a word processing add-in for Word that improves on Word's built in organizer feature because it's easier to access and works with open documents. It's slower than Word's Organizer but much more thorough because it ensures that automatic numbering copies correctly.