Has anyone tried to create any sort of file that allows Fire OS(Amazon's Fire operating system) to run on the rpi? I can't seem to find any sites on google that provide the necessary files.
That's not going to happen. Amazon's FireOS is based on Android, but is a closed, proprietary system.
Since there isn't even a usable version of Android, FireOS is extremely unlikely to ever become available.
Fire Stick gen1 is esentially a Raspberry Pi running Fire OS