Controling GREP so that found sets retain formatting

I'm using GREP to find a passage of text, and using found sets to reorder various paragraphs within the passage.

When I run it, the formatting of the found set takes on the formatting attributes of the surrounding text, as if it was pasted without formatting. Anyone know how to control GREP/find/change so that the found sets can retain their original formatting?

InDesign CS5, Mac.

Applescript preferred but will gladly take answers in JS, if not simply the concept of the approach!

Thank you!