Toro built this for me in exchange for a unicorn horn.
Xterra Trunk Utility rack
Xterra Trunk Utility rack
It's been in my rig since 2014. I absolutely love it.
The rack was designed to be even with the top of the rear seats.
One thing to keep in mind when you build yours is that the rear cargo area floor and utilitracks slope downwards towards the rear of the vehicle.