Just saw a Sony hard disk DVD recorder on sale locally (Canada). But, when I checked, I could not find anyone in the U.S. selling it (RDRHX780), nor is it listed on the U.S. Sony site, so it is undoubtedly in the same boat as the Pioneers.
I just checked LITEON, who have a tradition for bucking authority. For example, they sold stand-alone DVD recorders that also recorded regular, not “Audio”, CDs.
But, No, they have discontinued all of their stand-alone DVD players and recorders in the U.S. now.