If you think thats big you should see the 360 one...
A quick google and I could only find
this. It might just be a replacement official one though, im not sure...and quite a bit more than £10...
I dont find that the brick stops the wii being portable. An extra 5 minutes packing it all into the original box and everything is nice and tidy. As for cables under the TV I gave up on trying to keep them tidy years ago...