I got this intake for my A/C:
http://www.ebay.com/itm/2007-2011-Nissa ... 2845wt_932
It didn't come with the heatshield, though. Installed it in less than 30 minutes. No problems with the MAF sensor. Only bad thing about it (doesn't really matter, though), is that the little bar that's supposed to make the intake more firm and not move around a lot didn't reach the spot it was supposed to.
Didn't matter to me though, because I check it every now and then (at least once a month) and make sure the couplers are tight where the intake matches up with the intake manifold.