First, let me say that I have experienced a fire at an open track event without a fire extinguisher and IT STINKS. I was lucky and the guys at the track saw what was going on and came to my aid. Still, if I'd been in the back forty when it happened...... anyway, I'm in the same boat you're in. I've finally decided that I want the extinguisher on the drivers side of the car. If there's a fire your first priority should be to get the car stopped and get out of it. That leaves you standing next to the open drivers door. So, I'm leaning towards mounting the extinguisher on a bracket between the reat seat mounting bolts. Should be an easy fab, just a staright flat bar, two holes, and some hardware. That's the easiest thing I can come up with. Let me know if you come up with anything better.