I also used some insulated pipe wrap tape to make a heat shield while I had the airbox apart. I didn't take the bottom of the airbox off, but I was able to tape it up fairly good. No good pics of that.
Here is a pic of the Ram Air inlet part of the airbox that I insulated. I think this stuff was $3 or $4 a roll.
And a pic of the inlet set down onto the airbox. Fits great, no pressing or forceing it down.