Call Diesel Injection Service in Lubbock (they are in the Links section), or you can call A&M Turbo in Macon, GA. Scott @ 478-788-8771. Those things should be really easy to find. BTW, when you talk to a turbo shop guy, they refer to these things as "oil slinger rings" instead of a turbo silencer ring. Otherwise, you will get silence on the other end.