Bismuth loaded cartridges are scarce in Canada, except for old stock in the Gun Shows. I have only seen Bismuth shot for loading available from Will Bilozir at Gun Shows in Alberta and Saskatchewan, but no loaded cartridges.
Old stock Winchester No-Tox bismuth 2 3/4 shells did not list a Dram Equivalent, just "Max" in the samples that I have.
Tungsten Matrix Kent cartridges are available from Wholesale sports, and I assume other suppliers in Canada that handle Kent. They are the non-toxic shot cartridge of choice in the market at the moment.