The Apple Wiki: iPod Firmware lists direct links to Apple’s servers for various iPod models. iPod_35.2.0.4.ipsw . How to Install Manually
A Blast from the Past: Downloading iPod Classic Firmware 2.0.4 ipod classic firmware 2.0 4 download
Outside, the sprinkler stopped. The dog went quiet. The only sound was the faint, beautiful whir of a 1.8-inch hard drive spinning a platter of magnetic memory. The Apple Wiki: iPod Firmware lists direct links