nissan only comes in 4x4, only place i know you can get it is ebay. as for the tahoe its custom made body out of escalade roof and silverado body and bed sides.
the toyota started out as a crew cab with the little bed. squared the corners of the cab to meet up with the bed. here are 2 new ones. both started as 2 regular cabs and made them into ex cabs.
nice i know were a x cab s-10 is that is made and im 100% positive they make a x cab ranger also but ive built many 4drs i would take 2 x cabs duallys and make a 4dr out of them