I was skeptical st first too If you have an Ebay account I get mine from a user on ther atm307. Here is a link for the CS-X3 he has on there right now. It's the cheapest I hae seen on there for the whole thing (air freshener and assemble thingy)
http://cgi.ebay.com/ebaymotors/AIR-S...1076QQtcZphoto
He is fast shipping too. Also the Air Spencer AS is good. Here is what it looks like. I have never used this seller but these are what they look like. Its about as big as the base of a coke can. It fits perfectly in the cup holder in the back of my console, and they stay strong for a long time.
http://cgi.ebay.com/ebaymotors/Air-S...spagenameZWDVW