http://www.ebay.com/itm/PAIR-FENDER-MIRRORS-NISSAN-DATSUN-UTE-TRUCK-PICK-UP-1200-520-521-620-720-/161220992703?pt=Motors_Car_Truck_Parts_Accessories&hash=item2589851ebf&vxp=mtr how would I know they are real nissan? Is the nissan logo on the mirror enough or are there fakes out there?