Check the Microsoft web site. Also -- anyone own Dataviz's MacLinkPlus? That would undoubtedly translate them.
and finally -- can you open the files in their existing form and then translate them to an early Word version, that Office X WOULD recognize?
By the way, I still ahve MacWrite II files. And believe it or not, I also still have the program (it's only 11 or 12 years old...) -- every once in a while, it launches when I open an old file. I keep telling myself i really do need to translate them before it takes out my whole computer someday.
These are random thoughts on the situation -- someone else might have a much better idea.