@RickO posted:Brassuers stocks tons of K Line parts. I've purchased replacement diaphrams for similar cars there.
They should have most if not all of what you need:
https://traindoctor.com/service/catalog.asp
If they don't have the diaphragms it's been mentioned that Lionel heavyweight diaphragms will work/ are the same.
Cool. Thanks. While it was mentioned, why do these cars with the diaphragms work on 036 (What I'm running in the above video) but the Lionel heavyweight cars can't?