Kohler handles the Novita line of Bidet seats and here is the BD-N450US-NO seat on a TOTO Drake that I sold installed this week. $399.00 plus shipping. https://www.us.kohler.com/us/elongated-bidet-toilet-seat/productDetail/toilet-seats/1872437.htm Hybrid heater technology provides instant and unlimited warm water for comfort. 120 VAC electricity required. Heated seat with three temperature levels.