You could probably write a Java3D binding yourself in 5min - seriously just take the Xith3D version and port it (one single class!). I've written some advice on how to do it as you found.
Unless you are talking about the automatic conversion utility in OdejavaToXith3D - that would require a bit more work. But this class is entirely optional, it's easy enough to do ones own manual bindings (and for more complex shapes this is unavoidable anyway).
That said, I believe someone did do a binding, but I never saw the code. Hopefully if this is the case they will see this thread