[BR3W CITY]

Halon is the "race" option but systems are expensive and can be a pain to maintain. The big downside with all the fire suppression stuff is that the chemical is always destructive to something. Some of the film based systems can corrode aluminum if left on, and some of the powder systems will permanently embed in interior components. If you don't require a full suppression system, its not usually something being installed optionally.

I keep an extinguisher inside the driver side front bed panel, reachable within a step from the drivers seat, and accessible to a bystander if the drive is incapacitated. I'd take a look at all the different extinguisher options (ABC, Purple stuff etc) and see if there is something that checks all the boxes you need.