If your clients long for a country kitchen with that 19th-century look, then they may want to consider the Dickinson and the Hawthorne double-basin kitchen sinks. Both measure 33 inches by 22 inches, come in enameled cast iron, and include integral front aprons and optional hardwood cutting boards. They're available in tile-in and undercounter versions. All models have a faucet deck, but the undercounter versions also let you mount the faucet on the countertop or on the wall behind the sink. White sinks sell for around $650, while special enamel colors can cost over $1,100. Contact: Kohler Co., Kohler, WI 53044; 414/457-4441. Electric-to-Gas Conversion Want to lower your electric bills? If you live in a region with high rates and own an electric