I have created this special bracket to be able to mount a 10.88 inch 1 DIN radio on any Alfa Romeo 147 / GT. It is anchored in 3 of the 7 original screws and looks like the photos. I'l put a link to the tutorial I made on how to assemble everything.
I printed it in PLA+, but it will probably be better to do it in ABS.
Link to the tutorial:
https://www.alfistas.es/foro-alfistas/threads/%C2%BFc%C3%B3mo-montar-una-pantalla-2-din-distinta.71086/
The author marked this model as their own original creation.