just look up the recipe and you can create your own..today i just picked up a bag of fox farm ocean forest and a little bag of fox farm soil conditioner with mycorrhizae ,humic acid, feather meal, bone meal and some other good stuff! its not quite super soil but its the same idea
ny hydro store put it online. Shipping is steep, but its also a bag of soil which is less than ideal to ship economically. If you want to give it a try, its likely worth paying a bit more for a real good grow.