Hi there! Maybe these links can be of help:
http://www.hemiperformance.com.au/store2/p_658_Reproduction-Red-318-V-EIGHT-Badge
http://www.ebay.com/itm/NEW-318-EMBLEMS-DODGE-PLYMOUTH-MOPAR-RED-/370450199662?pt=Motors_Car_Truck_Parts_Accessories&hash=item56408d746e&vxp=mtr#ht_500wt_969