I work for NRMA Roadservice, and the other patrols and myself commonly refer these types of jobs to a locksmith company called Sydney Security Locksmiths. Their phone number is 02 9734 7155 or after hours 0414 466 228. They are a mobile locksmith company that will come out to and are very professional. I would suggest giving them a ring and have a chat to them and tell them your dilemma. They will tell you over the phone if they can or can't help you, and how much it will end up costing. In my experience they are a damn site cheaper than going to the dealer who often end up getting a locksmith out to program the keys anyway