Should be able to find one on Ebay, or order from Kia.
Although the airbag light fix will require them to diagnose this with their computers at the dealership. Could be a variety of possible issues. No way to tell without diagnosis.
My airbag light was staying on and according to the dealer it was due to a faulty switch in the seatbelt connector. Makes absolutely no sense to me, but they fixed everything under warranty. This was about a year ago.