ebay has a ton of them. just search: "oem nissan rogue foglight" and narrow it down via "lowest price first" & "buy it now".
also if you dig around on here, you will find some useful install instructions:
post6566426.html
post6344116.html
the install is pretty much straight forward:
1. unscrew the bulb.
2. remove splash guard via the few plastic clips
3. remove one screw to drop the whole light bracket & assembly.
4. remove the 2 screws that hold the light assembly to the light bracket.
swap & install in the reverse