Sorry for the (potentially) dumb questions, but my searching hasn't educated me to my satisfaction.

1) I want to add a small fire extinguisher to my ITS car. What do I look for and where do I buy it? I assume mounting to the cage is preferred. Where do I get the mount, or how do I mount it? Do fire extinguishers have an expiration date?

2) The car currently has an AFFF fire bottle system (Zero-2000). There's an expiration date on it, and the US supplier charges me a small fortune to recertify it every two years. Is the fire system non-compliant if past the expiration date? Would adding a fire extinguisher make the expired fire bottle a moot issue?

Thanks,