I know -- Johnny come lately -- but some av to work
It seems as though you have things sorted which is good ... Keep on making what you need as it will be a darn site cheaper, that's if you can find someone to sell you in small amounts.
UniPac is the supplier
http://www.unipac.ca/sections/contact-us -- comes in a 25kg bag and cost me $100 on the other hand as vagreys has said I import mine which cost all in $30 - $35 a bag
I too shall be looking into having someone make some up for me using the recipe you have used
By the way ....... Welcome