Rifle Rack on Access Cab Door (looking to steal some ideas)

I'd like to mount a rifle on the inside of the Access Cab door behind the drivers seat. I'm looking at that particular location because it does not take up passenger room elsewhere in the truck but provides quick access.

I'm perfectly cable of coming up with a method to do this - but perhaps not the best method. Right now, I'm thinking of putting the butt stock in the door pocket, and screwing something like a big-sky rack into the inside of the door.

My other thought is remove the plastic cover from the door, and cover the entire interior (including the window) of the drivers side access cab door with an aluminum molly lattice to mount equipment. I am drawn to this idea.

I'm sure there is a elegant approach that better highlights security.

So... I'm soliciting the TacomaWorld brain trust to show me their rifle mounts.