Hey
@Ifocus, Dobinsons sell their products online if thats an option. The local Jayco dealer had one Jayco/Pedders part number for the Pedders default shocks so they are the same on all Jtech 1 variants, ie dual/single, big/small van.
From my research the factory shocks are the same dimensions; capacity, extension and compression as Navara 2005 R51 Pathfinder rear shocks, i ran this info past Dobinsons and although they didnt 'endorse' it directly the wink was good enough. The rear axle load rating of a Pathfinder was close enough to half my vans 3t weight, so 4 x on my dual axle van was a perfect match. (Although Jayco/Pedders put the same ones on all variants anyway).
I ran with Dobinsons only because they help me out when every other industry source was spectacularly useless, so its safe to suggest any brand supplier (of which there are many) of 2005 R51 Pathfinder rear shocks is suitable ... just pick your favourite brand.