Wow.... When I saw the first pic I thought you'd blown the motor...
When fixing the seat in the Mustang -- the handle for the hard mounted extinguisher was under the seat... with a quick pull pin in it as well.... no way a guy could lean forward enough to get his arm under there - with driving gloves on and pull that pin and then pull the handle. Moved it up to the tranny hump right where I - or a track worker - could see it and pull it.
I have lots of spare parts -- let me know what you need... I also have 3 or 4 fairly decent spray guns -- like a Sata 4000 etc...