Smartkey fob spares

Has anyone had a good experience purchasing a spare smartkey fob? I'm somewhat paranoid about losing the fob and being stranded. I called three dealers and got numbers all over the place for the fob and the programming. All three dealers' parts people did not know what I was talking about at first, and after lengthy explanations I got information that makes no sense. There is an online alternative vfendor who sells it for $189.99, but it still needs to be programmed by a dealer.