The pipework and stickers would need to be purchased again I would have thought and the extinguisher itself needs a service. �120 to your door.
Same as this more or less
http://www.demon-tweeks.co.uk/motorsport/fire-extinguisher-packages-plumbed-in-hand-held/lifeline-fire-marshal-electric-fire-extinguisher-4-0-ltr-rally-package