Download Driver Updater Pro to get the most current drivers for your computer.
You can download driver for Canon CanoScan LiDE 80/50/30/20 CanoScan Toolbox 4.1.3.0 here, but DriversKit`s Team strongly recommend you to use Driver Updater Pro for finding latest version of this driver. You can download Driver Updater Pro here.
Also you can:
Search Canon CanoScan LiDE 80/50/30/20 CanoScan Toolbox 4.1.3.0 driver at Google