Finding the newest revision of a file

I've created and deployed a module for a client which aims to provide a stable link to the newest version of a file on a revisioned node. I'd actually forgotten about the code (which is why it hasn't been created as a project yet), but before I do so, does any other module available offer this functionality?

Here's the problem it aims to solve:

• Create a node with an attached file. Say the file is called "file.txt".
• Send out an email with a link to the file (http://example.com/files/file.txt). This could happen from a contrib module or manually from a user copying the link.
• Realize there is a typo in the file. Edit the node, create a new revision (this could also be enforced by the admin), delete the file, and upload the replacement "file.txt".
• Drupal keeps revisions of the older file for the older node revision. So, when you upload, file.txt becomes file_0.txt. Those downloading via email are going to get the old file!

As is, the module works in the following manner:

• Add a new menu callback at /file-newest.
• When a user goes to a URL such as http://example.com/file-newest/files/file.txt, the module finds the latest revision of the file (for example, file_99.txt). It then redirects the user to that file to that file.

So, think this is worth it to put up as a project?