WOW!!! I had not idea you were going thru all of this! I haven't been on the site since it changed over to the new format. Really sorry to hear you have had all these problems and delays.
Halon is definitely the way to go IMHO. CO2, because of it's very low temperature when discharged, causes water condensation which is definitely not wanted in electrical devices. Chemical extinguishers such as the general ABC types use what amounts to baking soda for a fire retardant which can be harmful to electrical systems also. Plus, they leave a mess to clean up. Halon leaves no residue and does not create a condensate problem. It simply deprives the fire of oxygen. (where did you get those?)After a recommendation from a friend, I took a look at the new Element solid state fire extinguisher. You will remember that I installed halon in both trucks and the Punisher. Once I learned that normal CO2 extinguishers can put out an engine fire but likely will ruin the engine in the process I went to the halon. Now these Element extinguishers provide much better performance, are safe for materials and humans and last basically forever. I have been installing them in all my vehicles in the trunk or in the bed. Same position on all of them so I can find it in a time of need. They are a bit more costly but never need to be replaced and work very well. View attachment 107544
They do sell stuff you can't find anywhere else. Last thing I bought from them was a tool for cutting open spin on type oil filters for inspection. didn't think about the halon, will check them out.Aircraft Spruce and Specialty sells Halon extinguishers for $200 and up depending on size. They also sell a lot of cool tools and other toys.
Most of the Halon bottles I have seen have a rated 12-year life, but I have no idea what that is based on.