I just recently purchased one from AutoZone. I believe they call it an EGR pressure sensor. I'm on my 3rd one. When the original one died (50K miles) I got a new one from AZ, but it was still the metal version. That lasted about 20K miles. The most recent one (May 2006) is the updated plastic version, so hopefully that one holds me over for a while!

1999 Contour SVT #1966/2760, Silver Frost/Midnight Blue Koni Kit, Mille Miglia MM-S rims, B&M shifter, Stazi mesh, SFCs, optimized Y-pipe & TB, SS break lines, K&N drop-in, Infinity Kappa speakers, MTX amp/sub