Nannergirl:
If you are in Ontario & the GTA area, these nurseries have banana plants:
Sheridan Nurseries
Sheridan Nurseries : Store Locations
The one in Etobicoke-East Mississauga had a couple of different ones - Basjoos & another that I can't remember the name of.
Humber Nurseries
Contact Us
They had dwarf cavendish when I was there this Monday.
Can't remember the prices.
Hope that helps.
Robert