haha... thats a common info these days... if yur city is 2009, then ur evaporator will be over 50% clogged with dust by now.
they don't even put that thing in a 2 million honda civic. U can get it easily from the honda guyz.. infact people like me, who know there would be an empty tray, don't take their cars away from the showroom unless they show you that filter is there...
corolla 2008 onwards has this filter.