Considering the Airbag recall, finding any is still difficult. Good Luck and talk to body shops, they sometimes have suppliers we do not have access to.
If the car was in an accident and the airbag was deployed, you will need to send your module out to have it reset. Lots of threads on that, but the company we have found is
$49 SRS Airbag Module Reset Service After Accident - Safety Restore
A few members have used them and saved the money needed to replace it, others claim you have to get a new one. Do your reading and make an informed choice. My car was hit in a hit-and-run and one of the sensors behind the bumper had to be replaced. I had no airbag deployment.
If the car was in an accident, and you have insurance, they will source and replace the airbag. Check with your insurance. That is why you have it. All you will pay is your deductible.