just change the front rubber
That's right. I think the Euro plastic frame is the same as the USA spec, there's a connection to the 'nipple', but it's covered by the rubber; so, get rid of the nipples, get two Euro-rubbers and that's it.
Except it's REALLY tough to change the rubber. It's connected to the frame with about 20 'stripes' or what do you call them which are almost impossible to separate from the plastic without damage. Use screwdivers to push and anything you can lay your hands on to pull them and hope for the best. And when you think you finally got the hang of it and it's not that hard, you get to the ones hidden behind the indicator light. Those are all but inaccessible. It's not
really impossible, just enough to make your day, afternoon, night and morning very interesting.
Reinstall isn't easy, but compared to the separation, it's child's play.
So get complete bumpers if you can.