We have a similar problem all over the world. The best and smallest Artemia cysts are those from the Great Salt Lake in Francisco bay, but they are the most difficult to get because they have become really expensive by now and most aquarists are not willing to pay for it. There are many other offers of cheaper species resp. brands, but mostly the quality is much less convincing.
We have only one company (Sander) in Germany selling true San Francisco Artemia cysts for 89,00 Euros a can (ca. 450 grams). The problem is: Sander is a wholeseller, only pet shops can order there. Here you see his offer (in German):
It would sound silly if you live in the U.S. and order San Francisco Artemia cysts from a German wholeseller. There must be American companies selling them, too. But the price is probably very high also over there. Nevertheless, you are fully right, to pay for it. The quality is great, and if stored in the refrigerator the cysts stay alive for years.