Where to buy Amylase ingredient?

Baking enzymes are actually mixed with flour or some other filler agent to make them dosable in the real world. The tsp full of the Amylase preparation would probably only contain a tiny few grains of the enzyme. These preparations are usually used by flour mills and industrial bakeries. (my better half is in the enzyme business, she recently brought me home a sample of amylase prep. to heat some grains up with, an Aromastuck)

What you could consider is Diastatic malt, that's a good source of amylase and you could possibly find it from a profi baker, or being that you're in Calgary you could contact Canada Malting.