Beth at EOA has both the new Dhunis’s and Happy Hari lines listed now, both of which are pretty high on the “goodness” charts for Indian incenses. These are hand rolled and seem much more real (read natural) than anything else on the market (Mothers might be in this group also), at least to my nose. Of course, short of some very expensive testing there is no sure fire way to tell, and even GC/MS testing is open to interpiation. Go with what smells/feels right to you.
Over at Equinox Aromatics, Andrew has brought in Star Child from England. They look to be very faithful to some of the esoteric teachings as well as also being all natural. Real Halmaddi is also available at his site and not to be missed, it is very entertaining to experiment with if you are making your own blends.
Kohshi has some new scents in, one of which is Sanjusangendo Incense. It comes out of a temple in Kyoto. Nice woody/amber scent with a hint of cinnamon. They also have Kyukyodo and Yamada Matsu available. It is generally best to call the store and check what’s in stock.