If you which a range of accessories such as jerry cans, tools, tarps, etc, how about doing them with a jeep trailer. For larger items, oil drums and such, the half track trailer would make another set. The Axis could be the Hanomag trailer, with German spares such as, Night vision for the Panther G which could be a nice bonus of say 3 or 4 items. The rest made up of the excellent ideas of others else where on the forum. Tow hook in open position for vehicle could be in the trailer set if needed.
Cheers.