Where can you buy hydrazine sulfate?

I am purchasing Hydrazine Sulfate for my father (has colon and lung cancer). As far as I found,

cantron.com/html/nutraceuticals/hydrazine.html

is the best pace to buy it.

For 30 mg or 60mg capsules:

1 bottle $40.00

4 bottles ($36.00 each) $144.00

11 bottles ($35.00 each) $385.00