Windshield Sun/Heat Visor Source

https://www.heatshieldstore.com/

 

I avoid the reflective shields like those, having had them disbond the headliners in the front of two vehicles from the reflected heat.

 

Lifehack trick: They work better on the outside of the windshield.

 

Buy a cheap generic one from the local store (Target, etc) and put it on the exterior of the windshield (outside the car). Some come with elastic loops that fit decently over the side mirrors to hold it in place. Anyhow - keeps the heat out even more, as it never gets to the glass in the first place.

 

Maybe you need to call them about the 328 and 355. When I worked at Ferrari of Los Gatos they were a few blocks away and would always come over to make patterns for all the new models. I am positive we had heat shields for the 328 and 355 models, as EVERY car that was parked outside had to have a heat shield in it, or you would become a former employee very quickly.
Maybe search for a 308 (same windshield as the 328) and search for a 348 instead of a 355?

 

1. https://www.autosportcatalog.com/catalog/covercraft.aspx?product_id=55998&gclid=CjwKCAjw4uXaBRAcEiwAuAUz8PYqLoF5iw2j8dZJHETtW7JrEzAFRmBpv5-QkQraegx3sMAJW0q19RoCT1EQAvD_BwE

2. https://www.weathertech.com/techshade/

3. https://www.covercraft.com/us/en/sunscreens