As Senex stated over on the MZ.org thread, Woody does not even own all of Final Writer Sources, because parts of it were licensed, such as the Speller, and maybe the Grammar portions of it.
I really loved Final Writer and bought all the versions available. The really cool thing was the Thesaurus (unmatched by MS Word or any other one I've seen). If it isn't included, IMHO it's not worth the effort. Still Final Writer was the most Amiga-like program. No port of any Linux-based app will come close.