The brown original gasket I had was leaking from a lot of areas, so I decided to just eliminate it. I do not know of any other source, I went to the accordion repair man near my office and they made a reed for my Vibrandoneon. the first one they made was almost perfect, the second one was softer in volume but almost exact in tone. I am trying to replace my C5 reed. I noticed from your pictures that it looks like a lot of calcium build-up (white power stuff) or is that something else. I have never seen this before in a Melodica.