Direct purchase using PayPal ($50 per license)
This script introduces a basic feature that is missing from Illustrator. It allows you to search and replace text items in your current file, or in all open files.
You can use this tool for plain-text searches (replace "cat" with "dog") or even use Regular Expressions for your search (replace all instances of a four-digit number with another number).
The tool will process all the text frames in the file (or files) and will report how many changes it made when done.
For more information about this tool you can contact me directly.