A cabin air filter would be nice, but the ones I’ve seen are for particles, dust and allergens, not gaseous fumes. Regardless, my truck doesn’t even have a mount for a cabin air filter.

I keep N95 masks in each FAK, one of which is under the seat of my truck, but that only provides for particulate filtration. What I am looking at is getting organic vapor cartidges for my 3M half face mask and covering those with particulate prefilters. That should be less bulky than the full face mask I have and provide adequate protection when evacuating an area (if I wait too long and get caught driving in thick of it).