I have looked at One Green World in the past but being located in the US I do not chance trying to bring plants in from them.
Unfortunately my biggest problem with acquiring my plants is finding them "locally" - within Canada or through a plant broker or importer (which are few and far between). Bananas are classified as 'houseplants' with the CFIA so I can bring them across the border as long as I accompany them but other plants - especially anything tropical, edible or able to survive in our climate - will most likely not make it across......they have to be really special for me to even try