The OEM wil not fit on the passenger side due to the washer fluid bottle.
I bought some Osram aftermarket DRLs and the body shop build the brackets to hold them. I don't think Osram makes the ones I installed anymore, but all you have to find is something just big enough to fit into the vent. Mine are actually a touch short for the front vents, but it is not noticeable behind the mesh.
http://www.the370z.com/attachments/e...e-img_0765.jpg