Update:
I found 5.0.19692 available for download here:
Opera Mini for BlackBerry download for Blackberry - Softpedia
However, the trackpad sensitivity makes it fairly unusable. BUT, other than that, so far it seems to work. That is, I can actually shut down the app and trackpad clicks actually work whereas the versions of 5 I have downloaded from the Opera website did not work. I couldn't shut down the app and has to perform a battery pull to kill it.
I located a .jar file for 5.0.19693 and might try to install it.
If anyone has a perfectly working version(no trackpad issues) of Opera Mini 5 on their 9650 I would certainly be interested in knowing which version they have.