muffster

Evening folks.
can anyone recommend me a fire extinguisher. I want one for an engine bay.The sort im after is an automatic type with a thermal hose which can be coiled around an engine compartment and automatically discharges through the hose when the temperature becomes to hot, i.e. fire.
So whats in your, where did you get it and how much was it?
Cheers fellas.
Muffster.