r/Cemu and the Cemu wiki have guides on how to dump your own games from a Wii U console. That's the only fully legal route.
Yes, the files exist on Archive.org, but they are piracy, frequently removed by Nintendo, and not officially endorsed by Archive.org. Use at your own legal risk. wii u roms archive.org
It sounds like you're looking for hosted on Archive.org . r/Cemu and the Cemu wiki have guides on
Here’s the direct and practical answer: the files exist on Archive.org