Regardless of the crap going on "over there" on another board, Lonestar is pretty much the standard amongst the balsa suppliers....and they have very good wood.
Riley Wooten, founder and still the overseer is a modeler first, and apprectiates those seeking the lightest woods...and the place has (I'm told) great selections.....I have also learned that ordering, say, 30" pieces if they'll work, might yield some better wood....