ware is the fueal pressure regulator on a taurus wagon 2000 on 2000 Ford Taurus

I have looked on both side of the fuel rails ? and behind the engan and cant find it.

Asked by for the 2000 Ford Taurus
Go to NAPA AUTO PARTS enter your info. and see pictures. I think both DOHC & PUSH ROD engines may use the same
part. Or it will look the same. This page should show the part and price. Get help if you need to change this part!!!!
It is mounted on the fuel rail.