This is the cheapest place I found.
HANLEES HILLTOP NISSAN. For $50.35 MSRP is $76.36 a savings of $25.95. Not sure though if part number 26582-3GY0A is for the 2013 red reflector since it states on the web description 2012 370z rim rear fog lamp. This part number 26580-1EL1A seems to be for the real light up rear fog light.