I am guessing there are probably more but these are the two that I am familiar with. I ordered dwarf orinoco from TOC and received 2 very nice plants. Haven't ordered from Phoenix farms personally but a good friend who buys from them (not bananas) recommended them to me for other plants and I just happened to notice they also sell less common, for Canada, bananas. But you'll notice their nomenclature isn't exactly standard, so it might be worth a call to clarify if you do decide to order.
https://mailorder.phoenixperennials....h=musa&Submit=
We specialize in tropical, food bearing plants, that will grow and thrive in the Canadian environment.
Of course if you want a bigger order comprising a larger selection of varieties and are willing to pay a little extra for phytosanitary certificate and such, Larry at
https://www.bananatreesforsale.com/ has an outstanding reputation for a quality product and excellent service. As I understand it though you need to order directly from him, can't order internationally through his website.