R-390 group, I am the other half that Al sent springs to. Same deal as Dave, Send SASE padded . I am going to buy 200 from Al to make more available. I will include the springs with the Oldham coupler disc I am selling for $47.00 mailed. Just for the springs, send the SASE envelope to Dan Arney c/o Global Pack & Mail 21315 Saticoy St. Unit R Canoga Park, CA 91304-5685. Thanks, Hank KN6DI