Why from another country? This will require a lot of paperwork, and even shipped, they may die in customs in case of a delay in processing.
Ricordeas are not a rarity in Canada - check online suppliers of classifieds.
Only, from my single experience, better to wait to the last days of the May for a good temperature for shipping. Mine arrive by Greyhound bus, 12 hrs in the road, all was OK (usual mushrooms, not ricordea).