Just saw this on ebay
http://www.ebay.com/itm/Yamaha-FJ1200-Air-Intake-Right-Purplish-Blue-Metallic-1991-NR-/150981268707?pt=Motorcycles_Parts_Accessories&hash=item23272f54e3&vxp=mtr (http://www.ebay.com/itm/Yamaha-FJ1200-Air-Intake-Right-Purplish-Blue-Metallic-1991-NR-/150981268707?pt=Motorcycles_Parts_Accessories&hash=item23272f54e3&vxp=mtr)
Looks like there's a right one as well.
Andrew