Actually, I just submitted the idea of an aux tank for Nissan NV full size to the Titan Fuel tanks website here: https://titanfueltanks.com/new-products-suggestion/ If everyone sent a request in, it might get more attention from them :) For reference, info on the Kodiak van with twin 55gallon tanks: http://www.outsidevan.com/kodiak.php http://www.expeditionportal.com/forum/archive/index.php/t-135865.html