Just found this site, and they have two different MAF adapters available for Nissan's - they sell them for $12 & $14 each, depending on brand. Take a look.

http://www.speedalliance.com/

 

theyre all the same I got mine for 20 bucks. and it looks just like those too

 

I made mine before i realized that they sold them.

 

What / how exactly did you make yours? I'm looking at trying to get one on the cheap...

 

I just got some pieces of metal i had laying around and trimmed it out to the correct size and then cut it out to fit on the maf. Then i cut out the center so the air can flow through. Then i found an empty vegetable can and welded it on to the end of the other piece that i cut out. The diameter of the can was about 3 inches so it was a perfect match to the dryer hose i used to make the cai. Just paint it and then you will be done. There is a pic on my homepage if you want to see what it looks like.