Hi, The bumpers are the same for Euro or US. The difference is adding Euro indicator, but for that you need to cut out the sheet metal between the bumper and the headlight and remove the US indicator below the bumper.
I converted mine to Euro during restoration process.
'75 Giulia Nuova Super 1300 Blu Olandese
'71 Euro Berlina 2000 (on a restoration process)
'85 GTV6 Nero
'87 Milano Verde
'87 Milano Platinum