Hi everyone, as only a few versions of unbrick tool are available here and that they allow to rollback to specific versions of Oxygen OS I decided to search for more and succeeded in that.
I managed to decrypt some of them (the most recent) but also find some that I was unable to crack that I still share here in case someone find a way to get their password. I also linked to 5.1.3 version decrypted by @Titokhan here and linked to 4.7.2 version decrypted by @prime8852 on AFH
As the instructions and Qualcomm drivers are already available here, I don't feel a need to rewrite them.
You can ask questions here on how to use and issues, however I might not be able to answer immediately.
Here are the files uploaded on AndroidFileHost ordered by Android version: