Update [3/27]: Amazon with 2Go Products has the new Luxe Bidet Vi-110 Fresh Water Spray Non-Electric Mechanical Bidet for $40 with free shipping. Thanks, slikkster!
Amazon with 2Go Products has the Luxe Bidet MB110 Fresh Water Spray Non-Electric Mechanical Bidet Toilet Seat Attachment for $40 with free shipping. Features quick installation and a retractable nozzle spray.
Looks like they're trying to unload last year's low-end doughnut hole washer model...
Newer version -- same price: http://www.amazon.com/Luxe-Vi-110-Non-Electric-Mechanical-Attachment/dp/B005IT4C6G/ref=s11?s=hi&ie=UTF8&qid=1332852983&sr=1-1