You Might try bekkers.com for some euro lights. Im not sure what system of HID (Universal, or a bulb replacement style (h4,9004,etc))that you installed on your SL. Euro lights tend to have that sharp cut off that you describe. Euro light sockets also accept H4 style bulbs, so if your HID system will slip into that socket, you'll be in luck. Im not sure about the difuser though....