www.horticulturelightinggroup.ca for qb products in canada.
Digikey.ca is good for cobs and samsung and bridgelux strips.
I use mousser for drivers. They take care of duties for you.
If using strips just use aluminum u channel for an easy cheap heatsink.
For cobs it is hard to find pin fin heatsinks in Canada. You can use a cpu heatsink cooler as an alternative.
When I made my order from RapidLED for my cobs the duties was like 27$ on a 350$ us order with shipping being 60$ so it was around 100 bucks cdn for shipping and duties combined.