Thanks for the suggestions. I tried CDex and it worked just fine.
Then, as these things go, WMP wouldn’t recognize the CDex WAV files (even after an Add to Library search!). So I burned them to disc and then let WMP rip them as WMA Lossless right into the WMP Library.
Strange thing about these particular Fonit Cetra discs though. Both were mastered/remastered in the 1990s â€” and some other Cetras have ripped normally.