Went to WM (again ...) and picked up the base Michelin wiper blades (20 + 22; $7 each). They also had M. "Radial", but not the one above.

Found that the blades (=frames) were of two different types on my XF, so now don't mind replacing them (wanted to keep the originals, but one or both are long gone).

The wiper arms are of the larger 3/4 in. variety (and not the smaller, more common 1/2 in.), so the new wipers don't snap on so well even though the instructions say no-problemo.