I am sorry to say that I have been advised on good sources before but did not keep good record. If anyone knows where to purchase sodium chlorite in bulk please put it here on this thread.
I have these sources but I think they are a little spendy.
Here are places to purchase bulk MMS in flakes. They don't look like very good deals. I will keep looking.
Here are a couple of sites that sell Sodium Chlorite:
http://keavyscorner.com ships to Canada.
They have Sodium Chlorite Powder with no heavy metal traces, no sodium chlorate, and no lye in the inert ingredients. They've been around aehile and have a good reputation