Many thanks Sussudio. Can you recommend a seller on eBay or Amazon? On eBay I've seen Auto Locksmiths selling the 3-button version and Jetline Trading selling the 4-button version. My XF is Right-Hand Drive so I believe I need the 3-button version since my original key fob has only 2 buttons - no PANIC button. Next thing to do is find a locksmith who can cut the blank blade....