Go to the dollar store or dollar tree and find the size and shape of baskets you want, buy a can or two of white spray paint. Paint, let dry and presto! White wicker baskets.

Go to the google homepage and click the "Shopping" link. Search for "wicker basket" and then organize results by price. Like the other response says, you can spray paint them whatever color you want so just grab the cheapest ones you like on there.

(You can sometimes find a $5 off or free shipping coupon if you do Google checkout for the first time too.)