Airstreams use Thetford fittings. You can get them at Camping World. http://www.campingworld.com/browse/s...ap/skunum=4186
I don't know if they have them at the store in Mesa, but you are close enough for a ride over to see. I live in North Phoenix (long drive) and buy most of my CW stuff over the internet. If you wait till you have $99 of stuff (used to be 75) they ship it for a buck.
You should try and get to the Four Corners Rally
in February. We Arizonians are being out numbered by folks from CA, NM and CO.