Where can I buy monoflo tees in Canada?

[Keesa]

I am retrofitting my very old single loop hydronic baseboard system with modern radiators. I have been scouring the internet to find monoflo tees to make the conversion but apparently nobody carries this item which is available at the Home Depot in the USA for $9 (no they won't ship to the Depot in Canada). If anyone knows of a supplier (I'm in Ontario) I'd appreciate it.