Where can I buy thunbergia-grandiflora seeds/plants

you can find a lot of plants like this and many others on ebay and they seem to be pretty cheap also, hope ive helped, i searched on your behalf and theres 2 listed at current though they are a fair distance from you, thailand and malaysai i think it said,goodluck

For seeds, try Thompson & Morgan or Dobies online - they do plants too, but not sure if they ship to Canada.

Chiltern Seeds are very good for unusual plant seeds, and send to other countries.