I suggest that you go to the Mobley Web site and contact the "boss", Carl Mobley. Carl maintains the site. He is the American "expert" on Mobleys. Simple click on your web server and type in Mobley Home Page. It's an amazing site. However, you must "join" before you can receive any information. There are no fees involved. You just have to provide your Mobley history. Good Luck Art Mobley...who knows, we may be cousins..