Canada narrows your choices, since export import gets complicated across national boundaries. This is also the wrong time of the year to expect to find bulbils available, although you might luck out. Normally one orders them about now and receives the shipment in late summer when they are mature for planting next fall. If you are still planning to plant this spring, you need to get at it real soon, or you won't get much back.

Boundary Garlic Farm appear to have a good selection of bulbils but as oldDutch mentions they won't start taking orders until August here is their page

Google Canada garlic bulbils

There are a number of Canadian garlic nurseries, and I have seen some that still have umbrils of bulbils available, but I did not note which since I am in the US.