Finding a paint I've needed for a long time

Hey I had what might sound like an easy question. I have looked and looked for years for a hobby store in my area that sells Satin Black paint. I've always needed it for my models but I've usually had to substitute. I recently bought an airbrush and I really want to find this paint to get it as true to how it should be as possible. Does anyone know anywhere online that I could buy some Satin Black paint, not sure if Tamiya or Testors would have it, maybe some place I haven't even thought of. Thanks alot.