Checkout my FREE SCRIPT* to Create VR Tours from Rendered Stereo Cubemaps. Give it a test drive and let me know what you think. It's an initial test release, so please give me some feedback if it's working/not working for you. Make sure you READ the instructions carefully! Just feed the script your stereo cubemaps (12X1) and it will do the rest.
I just wanted something custom that works for me as I already bought KRPano before many of the current alternatives came out. Essentially the script is a UI for KRPano so you don't have to worry about file or folder structures, XML or any kind of programming. *So even though my script is free and I'm sharing it, you will need a KRPano License
Have FUN and please report bugs!