I recently bought a '96 3500 extended cab dually, 2x4, and noticed I didn't have anything to work the jack or remove the spare tire with. I saw, in a truck on a lot, a kit in a vinyl case, under the back seat. Is this the accessory kit, and what's in it? Is it the same for a 2500 as a 3500? I will peruse the recycling yards for one. Anyone have one for sale? Thanks, Bob