You don't need to download any files for 2.0.0-2 - 9.4.0-21 because I downloaded virtually all of them and included them in a zip. (I left out one Japanese fw that didn't have a name, it was after 8.1 and before 9.0, I don't think anyone will miss it)
Did I miss it somewhere or did you not share this zip with us also? Just curious. Did you organize the files into labeled folders? I would definitely be interested in the US set of files.