You really can't miss it. The OEM valve is only $110. 3W4Z-9D475-AC
Also, the hard vacuum lines that attach to the EGR assembly and the fuel pressure sensor can get very brittle and break if you just look at them wrong, let alone disconnect and reconnect them.
I'd post an illustration of where it is, but honestly if you have to ask you probably shouldn't be the one to replace it. It's not too involved, that it is a pain and it is easy to damage the parts near it.