Alfa 159 heated seat control bezel

A colleague of mine has an Alfa 159 with both of its heated seat controls fallen out of its place because of the broken bezels.

Unfortunately, you can only buy the whole control knob, which is not cheap, so he asked me for a 3d print.

First we tried an exact copy, but that didn't work very well, because it has very thin walls, so we decided to strengthen the walls, and add them in all four edges. This means that it doesn't fit perfectly into the seat, you must enlarge the original whole sl