I think us U.S. users are looking at the cover below your headlight:
Does something like this, no? (off a BMW 3 series):
As far as lowering goes I found this:
Local to you I found these guy's "Pedders Suspension"
http://www.pedders.com.au/catalogue/mazda/cx-9/2007-2011-tb10a1-tb10a3-mod
Of note, the "2011-on" section mentioned nothing of springs for it, but the suspension didn't change at all after 2011, as far as I know. Could be worth a call or email to these guys to see if your CX-9 qualifies for the kit.
Edit: Additional searching found this guy who actually did it to his CX-9 with H&R springs for the Ford Edge (same platform underneath):
http://www.mazdas247.com/forum/show...It-s-Lowered&p=4561709&viewfull=1#post4561709