air ride sensor

I have a rear air ride heigh sensor that is not working, and i was wondering if there is any other places on the internet where i can get one. americanairsuspension.com does not cary them any longer. Last winter i had problems with my front and i think you posted 2 or 3 places to look find parts. If you could tell me where i might be able to find a sensor that would help me out a lot.
Thanks,
Zack