At this time, we haven't developed strapping kits for the 10 Gallon or 15 Gallon Undermount Water Tanks. We suggest using stainless-steel or galvanized steel-slotted strapping with 1/4" riv-nuts to secure the tank to your van's undercarriage. They are available at most big box hardware stores. Be sure to only use corrosion-resistant strapping, as the strapping will be exposed to moisture.