This popped up on ebay. Assembly line correct....
https://www.ebay.com/itm/NOS-Assembly-line-65-66-Mustang-C5AE-9155-A4-fuel-filter-Rotunda-Logo-Clamps/253385992294?hash=item3afefb6866:g:MoQAAOSwt4xaZ86m&vxp=mtr
https://www.ebay.com/itm/NOS-Assembly-line-65-66-Mustang-C5AE-9155-A4-fuel-filter-Rotunda-Logo-Clamps/253385992294?hash=item3afefb6866:g:MoQAAOSwt4xaZ86m&vxp=mtr