TPIS sells them, $30.00 for the kit.

You guys think this will be worth it?...considering buying it.

http://www.tpis.com/

 

No, just drill a hole in the drivers' side of the air box lid facing the motor, there should be a flat smooth spot where b/c they did this on the 2.8L cars and the lids are the same. Make the hole just smaller in diameter than the threaded part of the sensor. Then thread it into the airbox.
Get a length of wire a the Parts store of you choice, and 4-butt connectors or solder them if you like and add heat shrink tubing to protect the connections. Like $10 bucks....@ Radio Shack.

 

I think the MAT is worth 5 hp ~