Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
The Survivor is a brand name of a door lock.
To have a door lock replaced, you would need either a locksmith, or the manufacturer of the lock system, perhaps, if they do that service.
I couldn't find out who makes 'the Survivor', but I advise you to contact them, and ask about key replacement service that they might provide. (Be prepared to prove ownership, and perhaps submit a certified copy of bill-of-sale for the Survivor lock set, and perhaps the serial number off the lock also.)
Or you could tell me who makes the Survivor lock set, and I will look up contact info (and other info, about their possibly having key replacement service) for them.