The fender turn signals are different in Europe, they protrude outside the fender. I think they must be visible from behind to be street legal in Europe, at least in Sweden. No prismatic inside surface, more like a wave. I have never tried to 3D-print transparent plastic, but read about it. The bottom part is okay, just need to separate it from the glass part without breaking it. The Shamrock isn't the European style, it has a flat front surface.

/Lars