For a while I had a car which would kill any 12V to USB adapter which was plugged in when cranking the engine. I had to remember to unplug before cranking and I killed quite a few when I forgot....
I have an old car, that lacks a central suppressor, which may see up to 80V load dumps if you respect the original equipment requirements.
I used an off the shelf, 12V USB car charger, and designed and placed a circuit upstream that disconnects the charger around 24V, well below its 36V absolute limit. I can dig up and post the design if there is interest.
I decided that was less work than designing and making an extra robust charger.