I know that you can pre-order the Hori Classic Controller for the Nintendo Wii from Amazon.jp, but if you can’t read Japanese, there’s a better alternative in English with added bonuses of free shipping (in my case), no geographical restrictions and savings (due to the exchange rate).

Play-Asia has the Hori Classic Controller open for pre-orders with the price tag of USD 29.90 each. The colours available are white, light blue and black. Click on the previously mentioned colours for purchase details.