As far as I can tell, this app is not listed at places like VersionTracker, and isn't exactly easy to find at Adobe's site if you don't already know it exists. I'm not quite sure why Adobe is so keen to keep its existence a secret.
You can get the player from the Adobe downloads page. Scroll down to the section entitle Adobe Flash Player 9 -- Standalone Players (Projectors) for Macintosh and download the proper version (Intel, PowerPC) for your machine.

