If you can find a physical copy at a reasonable price, buy it and rip the ISO yourself. If not—and given the game’s scarcity—downloading a pre-made ISO for personal, non-commercial use through emulation is a widespread practice among retro gamers.
To play a , you need a Wii emulator. The gold standard is Dolphin Emulator (available for Windows, Mac, Linux, and even Android). If you can find a physical copy at
How to install: Most mods come as .dff patches. You apply them to your vanilla ISO using a tool like DeltaPatcher before loading into Dolphin.