If by "Zorin list," you mean the additional drivers tab of software and updates, Zorin tends to be slower to add drivers. You can add the graphics-drivers PPA to address this:
sudo add-apt-repository ppa:graphics-drivers/ppa
I believe a refresh with that PPA added should make the driver available, but I tended to go the whole way in the console. Instructions here:
These days I actually use the drivers supplied directly by Nvidia, though there are more steps and it takes a bit longer as it actually builds the kernel modules directly on your system. (This will require updating gcc, the GNU C Compiler on Zorin 17, but it's easy and a link in the instructions covers how.) The faster your computer is, the less of a nuisance that would be. I recommend this method only for people who want the absolute latest drivers on their own terms, or total control over which version you're on, as it bypasses package management altogether: