Sorry do not know of canadian source, but what a beauty. Sometimes if you contact the US counterpart they know of canadian resources. Here is a link for some companies is US.

Here is a link that might be useful: rose search info

This sounds like a place you might want to email. They are in Vernon, B.C. I haven't shopped there (yet) but they might just have what you are looking for. They are growing organically and the roses are grown on there own roots.
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Hardy Own-Root Roses
Cedar Hollow Rose Farm located in the Okanagan Valley of BC specializes in hardy-own root roses. Shipped across Canada and the United States.
website address: www.rosefarm.ca

Try contacting Pickering Nurseries in Ontario which specializes in roses. The plant itself isn't listed in their catalogue but they might be able to assist you in locating this special plant.

ianna