There's no free one. You'll either need to trim or buy a different case. What case are you using?
My recommendation is to either trim your board using the guide, and wire up custom regulators, or use a bigger case.
Dang, I think our brains must be connected stronger than a ShockSlayer soldering job...
Uhhh... Did you measure before buying one? If you want a bigger case you'd probably have to go the 3D printed route, because there's no way you can modify a gamepad case to fit an untrimmed Wii.
I say this a lot, but before I set out to make a Wii portable, I knew less than you do right now. I didn't know how to solder. If you have a meter and an iron, I say at least give it a shot. Just follow the guides very, very carefully so you don't solder something wrong, like composite to 12v.
That is a tough question. A great number of wii's died before the guide was made in the process of wiisearch and development before the days of the compendium and the trimming guide. To find some eggs, you gotta break some omelets. Now that it is fully documented, I do not destroy wii's unless i am trying something experimental and difficult or do something really stupid.
Measure the board and check a site like polycase. You'll find something that fits.
If you install the wifi IOSes, you will need a wifi module wired properly for the wii to boot. Without nowifi, the wii will sit on a black screen unless wifi is connected.
The idea is with hot air that the solder will become liquid for every pin at once so you can just pull it out during that time.
