These are hard to find in good shape so I thought I'd share this:
http://www.ebay.com/itm/1961-1962-1963-Ford-F-100-F-250-Unibody-Tail-Gate-61-62-63-PU-Very-Nice-Original-/140984928346?pt=Vintage_Car_Truck_Parts_Accessories&hash=item20d35b485a&vxp=mtr
NOTE: This sold for $570.00.