I have been using a good one over on the site below. Good stuff. But I will check out this new one.
I like to make my own. Much cheaper. Non Genetically-Modified-Organisms lecithin can be found at Vitamin Shoppe or on line at Vitacost. Bicarbonate of soda is used in the form I make to balance the PH and not have such a sour taste (which I do not care for.