I'm looking for a Hitachi Boost Sensor. I'm not sure what models/years came with them, but there's one on my '99 ES. It's just an absolute pressure sensor that goes on the intake piping.
I went to Nissan and after about an hour of searching they determined that they didn't know what the part was, or where it came from, but they could get me one in for approx $600
So instead I figure someone on the .org must have one.

PM or email me if you have one.

 

I have one, $20 shipped

 

Got one