I have decided I may buy a frog in the near future, yet I don't know where to buy one. The first thing that came up was Backwater Reptiles, but people say their reptiles arrive diseased. I'm thinking of buying a frog from a good reptile website that won't mail me a diseased or dying frog. Any suggestions?

(EDIT: I live in Canada, do I have to sign any paperwork to be able to send a frog here?)