Yes this is the stuff you need to make your own two part solution. Calcium and Magnesium. Just pick up some Epsom salts and baking soda, and you have pretty much everything you need. I will find the recipe and post a link.
I would like to get as close to a full pallet as possible. It has been slow going. I have been contemplating posting on the OSRAS site. See if I can drum up some more orders.