It looks like the latest leak of OS 220.127.116.111 for the BlackBerry Tour 9630 contained a new version of BlackBerry Messenger 18.104.22.168. From what I can tell the team at CentroBB spotted it and then BBHybrids took it from there. They have extracted the desktop install and created an OTA install out of it to make things easier.
WARNING: These files are not tested and are a beta release. MAKE SURE TO BACKUP your device before trying them. These leaks are not for the faint of heart! Proceed at your own risk!
Thanks to everyone who sent this in!