Front Driver Side Air Bag Inflator problems of the 2004 Subaru Impreza

I have received a notice that my car is being recalled under Subaru recall campaign wql-48 (NHTSA recall number 14v-399), for a problem with airbag inflators. Since then, I have contacted 3 different Subaru dealers to try and schedule a time to bring my car in to have the work performed. However, I was told that they don't have the necessary parts in stock. I have contacted Subaru of America, and was told that I will be receiving another letter once the parts are available to perform the recall work. From what I understand, the manufacturer has a certain time window to notify the consumer once the recall is announced; however, I feel that in this case, the notification is useless, since I'm unable to get the car repaired.