Nope, all you need is the wheel and airbag. There will be an adapter plate attaching the momo QR hub to the stock hub, so you just remove that and then use the same 4 bolts holding it on to reattach a stock wheel.
As for the airbag... hopefully whoever installed it just stuck a resistor into the factory connector, or at the very least cut the connector and soldered on a resistor rather than getting an airbag light and removing the LED for it from the dash to make it go away. Assuming they just stuck a resistor in it tho, you disconnect the battery, pull the resistor out, and just plug the airbag back in.
Not sure where you're located and I don't know about shipping an airbag, but I have a stock wheel and airbag that I removed from my Elise to install a smaller momo wheel.