I have a Stable Energies fire extinguisher mount for 85 and 86 MY cars. It was installed and removed the same day because my wife is very petite and her short legs and the fire extinguisher could not co-exist in the same space immediately in front of the passenger seat. It is in brand new condition except for a little grinding in one back corner made for fit purposes. Asking $50 plus shipping from 21108.
A link to the product is here:
http://www.stableenergies.com/Fire-Extinguisher-Mount-Power-Seat-928-968-993/productinfo/FEM2B/