So you want to move these FC files from an Amiga disk to an IBM 720K disk or a modern USB thumb drive? You want to send your disk to someone with an Amiga? You just want a print-out?
Depending where you live, there is probably still an active Amigan within driving distance.
IIRC, it seems that FinalCopy files were readable by some modern word processors, like Word, OpenOffice, etc, especially if the files could be saved in RTF.