ebay is your friend! i got my VC and nunchuck from them at retail price (not including shipping and handling) the other remote, i found at my local toys r us
I bought my first extra Wiimote when I bought the system. I bought three nunchucks at Gamestop. I bought two more Wiimotes at Toys R Us last week to complete my 4 sets of controllers and nunchucks. Keep calling vendors. I'd lean towards Toys R Us.