The others are right about American car parts. After 10 years, you may be out of luck, especially on body and interior parts. Mechanical parts are usually still available. But I would think that being it is a safety related item, it would still be available from Ford. The dealers also have a network they can get onto where they can do a dealer search for a part across the nation. You may want to ask your dealer to run a search. My local dealer is always willing to if a part shows to be obsolete or not available. You might also try aftermarket parts dealers (NAPA, Autozone, etc.). Then there is always the junkyard. If worse comes to worse, you can remove the bulb or have the air bag disconnected.