I've got a set of bongo's, the game (the case is a little roughed up but not too bad disk and instructions are good) and a Donkey Konga branded carry case back pack. I'd be looking for £10 but the postage is a massive £23. If this is no problem for you, i've also got a spare black PAL Game Cube (console only, could throw in an AV cable as well) you could have for an additional £5 but then the postage would go up to £28.
Bongo's, game, back pack for £33 delivered
Game Cube console, Bongo's, game, back pack for £43 delivered
If you are seriously interested let me know and I will take some photo's for you.