I am looking to add working diaphragms on some Overland brass Superliner cars. I have the brass ones that shipped with the cars, but having some working ones would be nice. I have searched and have seen options, but I am really looking to hear from somebody who has some.
American Limited Models seems to have some that are close. Precision Scale Co. has something listed but it is special order or something.
Images of all of these are pretty much useless.