there's a whole lot of sizes to fit the nissan products (my maxima too).
try nissan's 15208-9e000
baldwins B1402 (my current)
Napa Proselect 21356
& over at the Nissan Forums they seem to like the Mobil 105/110's.
If you are still in warranty I would use the spec size filter. If you used a oversize filter that was found defective, both Nissan and the oil filter manufactuer can deny any warranty claim. Remote but possible.