Software Center messed up my proprietary driver installation and I must revert to the original driver (the one you can find in "Additional Drivers" tab under software sources.
However Software Center corrupted my video driver and Software Sources does not allow me to revert or change anything. Completely removing the proprietary driver leaves me with a corrupted x.org and does not work. Where can I download an exact copy of the "X.org AMD display wrapper" and install it because right now I have no GUI.
I assume you have access to the text console. If not, login and use CTRL + ALT + F2 to sign in with no graphics after you boot up.
I believe this is what you are looking for
This will install the driver you are talking about.
Reboot for the changes to take effect.
To first remove fglrx "proprietary-drivers" you could run this before the installation.
you can install the ati radeon driver like this
after the restart
Alt+F2