ordered £3.50) this from:
Wii - Accessories - Gamecube Controller - ChoicesUK.com
I'm sure it's nothing like as good as OE GC one, but bearing min mainly to be used by kids for SuperMario64 on VC, it's seems fine.
Thought it was white but is actually a very light silver effect (almost white TBH) - does feel a little cheap when first pick it up but once used for a while I really dont notice it.
Some of the button mapping is slightly different for SM64, but I think that is the same for all VC controllers.
For the price and what I am going to be using for I think it's great.
PS - as a first time use I am quite impressed with the VC game experience overall - adds the VC title as a new channel - painless to register card point and purchase.