Hi tekila,
I don’t actually have a list of manufacturers or online stores that ship across Canada up to now but there are a few I know of that do.
Canadian manufacturers or retailers …
Memory Foam Comfort Member of The Mattress Underground
CBH Wood Furniture Member of The Mattress Underground
Some other sources outside TMU membership include
sleepys.ca They sell a wide range of mattresses and component latex mattresses as well.
Discount Foam Sells mattresses as well as individual polyfoam, memory foam, and latex layers (Western Canada only).
The Foam Store Sells mattresses as well as memory foam and polyfoam.
Best Sleep Center
Ton furniture.
Silk and Snow
Novosbed
Douglas Bed (from Novosbed). Canadian-only.
US Manufacturers and retailers that ship to Canada across the border …
Arizona Premium Mattress Member of The Mattress Underground
sleepez.com Member of The Mattress Underground
nestbedding.com Member of The Mattress Underground
Some more sources (Non members)
Supreme Comfort
Luxi Sleep
Helix
wright bedding
the natural bedstore
Zenhaven (Ontario only)
Rocky Mountain Mattress
Casper
halstead.ca
tmasc.ca
Dreamfoam & Brooklyn Bedding
US-mattress
I would avoid the major brands they carry, make sure you can find out the quality specs of any mattress you are considering here (since many of the manufacturers they carry may not provide them), and confirm the cost involved to ship to the specific province you are in.
As I think of more I’ll add them here. Make sure you call any US manufacturers for Canadian prices, shipping rates, and any taxes or brokerage fees that may apply as well as their return/refund policy for Canada as they will probably vary widely depending on the type of mattress that is being shipped (some may be able to ship UPS or have shipping rates that are discounted and some may require truck freight which is more expensive).
Phoenix