Depends on the wii itself, the serial lookup is only a guide.
However... d2pro Or wasabi are IMHO the best options out there.
Do not get a wii clip, either get the mod done by an installer or if you are handy soldering, you can try it yourself. The pins are about 0.5mm pitch.
I understand the law is different there than up in Canada, so I am not sure where you can buy.
Hope this helps