2nd Jene's Tropicals. She usually has a pretty nice selection of mangos, citrus and avocados.
Also in Clearwater is a guy named David Halliburton who has a really great selection of grafted mangos, Super Haas avocados, jaboticaba, Barbados cherry, guava, atemoya, bananas and some other kind of hard to find tropicals. Runs ads in Craigslist farm & garden section. Address is 1668 S Prescott Ave. Clearwater 33756 Ph: 727-599-8985. I bought mangos and bananas from him and very satisfied.