Tools to search and replace text in Canvas pages

[patfm]

We found a tool recently that someone had developed in the earlier years of Canvas: at:http://www.imathas.com/canvas/canvassearch.html

It is not working as far as I can tell at this time but the code is in Github.  We are wondering if anyone has developed any text search and replace tool that can be used to globally search and replace text on Canvas pages.  We know of good universal search tools like Atomic Search but would like to know if there is replace functionality as well in any tool.  

The code is here:

https://github.com/drlippman/canvas-scripts/tree/master/API

with javascript, PHP and HTML versions.