I've been looking at other engine options just in case but there doesn't seem to be a common conversion. Don't know how feasible / hard / easy it would be to do but a nice Mitsubishi Pajero 2.8 diesel engine would be well suited in my opinion.
And.. yup, that is a Skoda Pickup you spotted, well, its the volkswagen badged version. Just deciding as to save it or junk it, its got 60 k on the diesel engine but had serious rot issues before someone forgot to remove it from a field they left it lying in for a year

