i have been trying to find a fire extinguisher to fit in the cutout and strap bracket under the back seats. I've tried two and the first one was too big for the strap, the second too long. its almost impossible to get a good measurent of the strap assembly because its a little ragged from being stepped on or kicked. in order to get a good measurement it also needs to be under tension which is impossible too do in the cavity it sits in. its going to be a trial and error thing unless someone can f