The Landpride backhoe is interesting. One concern I have is that, if you go to their website and look at the specs for the unit (BH1560), the overall width is 5' 8" with the stabilizers folded up for transport. That's a lot wider than the tractor. Still, it looks like a quality unit.
They also list a "future" frame kit for the JD 4100, but now that the 4100 has been discontinued, I wonder about that. Maybe one for the 2210 or 4010/4015?