Rear quarter panel air bags and sound deadener around them Need advice!

[trunks9_us]

Ok I have been working on trying to isolate every rattle spot on the car and it seems like the I have found the last spot which is mainly the rear quarter panel but problem is air bags ar there there is certain area I could put on there but the idea is to take the module and wires out slap the deadener on all the spot except where the bolts go at then put the air bags stuff back in the spot. Problem is I dont want to do this so should I go to car audio shop or car dealer? The audio shop will know wtf there doing as far as to where to put the deadener at but they might not know the air bag assembly right. as far as toyota will know how to do that right maybe giving it is a 09 corolla they might not know how. Anyways I am going to car audio shop today to ask them what they think but what do you guys think I should do? I am pretty sure this is where the last rattle is coming from not positive thats why I am going to the car audio shop to ask them.