[Bluvee]

http://www.amazon.com/TYC-Cabin-Filter-NISSAN-2007-2008/dp/B00162AKZQ

http://www.logical-source.com/2007-NISSAN-VERSA-3367.html

http://www.logical-source.com/2007-NISSAN-VERSA-3367.html

Between 8 and 18 us dollars.

Air Filters:

http://www.carpartsdiscount.com/auto/parts/2007/nissan/versa/air_filters_cleaners.html?3594=2026

looks like carpartsdiscount.com rocks.