Cheap "wii" drum solution

[Douwe]

I'm looking to connect a drum kit to my wii for a performance at my school's talent show. Guitar hero or rock band 3 are both possible.
Does someone know a cheap way to connect electronic drums to a wii? (For example a midi adapter but cheaper preferably)

[mstreurman]

Borrow the original Wii GH or RB drums and connect them using bluetooth passthrough and a Wiimote