Jellyfish stings can leave quite serious scarring.
With regard to where you can buy Safe Sea, first ask at your local dive shops. After that, you can try 888-278-6854 or on line at sd501.lifestylesdirect.com. I don't know if this telephone # and web address are the only place on the web that you can get it or not. If you searched Nidaria on the web, you might find something that way too. Good luck. Let me know how it works out.