joshferbs

Due to some miscellaneous conditions, i may need to replace the driver wheel air bag on my 2012 g37. There is heavy wear on the actual air bag, which leads to my question. Do i need to replace the whole air bag unit, or is there a way to replace just that front part (with the infiniti logo). There was an ebay seller who had just that cover and said it just clipped on, but the dealer said the whole bag needs to be replaced. Does anyone have any idea?
thanks