Ironically right here in FL I cannot find any goldfish plants. I would pay for shipping etc.
Are you talking Columnea or Nematanthus? Either way there are a couple of mail order places that are very reputable. I have used Rob's violets or the Violet Barn before, but Lyndon Lyons has a good reputation and I wouldn't hesitate to use them. Here are those links:
The Violet Barn
I don't ship or trade anymore, so I can't help you there. Sorry.