Tracer L.A.V. by Pierre E. Fiesche. You can see the Minifig Trophy used as a scale marker. Still, this looks as if it can be used at 7P scale.
Spade F.C.V. by Pierre E. Fiesche. Similar design and size to the one above.
"Ox" Light Module Transport by Pierre E. Fiesche. As you can see by the Tracer in the background, this is in the same scale as the other two vehicles.
All of these designs would make great terrain or stations. You should check out the rest of his Flickr stream. There's some fantastic work there.