Sorry I’m late to the party 
They’re not cheap, but if you have the room…
Having had the meltdown myself So, this happened ('small' fire) , there are a few options along the way to keep this from happening again. Now that I’ve had to move the machine into a much smaller area (since my wife’s candle business has grown well past mine) in the garage attached to the house instead of the shop, I’ve added in a 15lb CO2 extinguisher with thermal fuse valve. It gets hot in the cabinet, the valve lets go and dumps the whole bottle. Bit of $$$ and plumbing in the process, but keeping fire out of the house was a good motivator.