Unfortunately the holds/delays website I found lists the SIABs as n/a as far as availability.

http://www.us.leaseplan.com/pnews/ponmain.htm

I'm debating whether to go ahead and order mine without the airbags. I personally know the importance of them, as a friend of the family was killed when he was T-boned by a stolen Jeep last October, but I'm not sure about waiting undetermined months either (I know what our friend would say).