Why would you want to do this?
It is probably illegal. Assuming it is legal though, it is still probably a bad idea. Any animals that are kept in captivity are very possibly exposed to pathogens, diseases, etc., that could have very bad effects on the wild population if introduced. The WC pet trade is a prime example, it is thought to be a cause for the spread of deadly pathogens and diseases, which have caused amphibian declines all around the world. I would strongly advise you don't do this. -Seth