I got my front wheel hub/bearing from rockauto.com. I see they do have rear ones for 2011 LEAFs:
https://www.rockauto.com/en/catalog/nissan,2011,leaf,electric,1447777,brake+&+wheel+hub,wheel+bearing+&+hub,1636
rockauto.com has awesome customer service, BTW.
I got a set of shocks and struts...