Hers's a system I just finished for a friend's work van
Click on last pic for video showing access to the gun stash only accessible by using a magnet
IMG_4391 by Jon Polo, on Flickr
IMG_4388 by Jon Polo, on Flickr
IMG_4389 by Jon Polo, on Flickr
IMG_4390 by Jon Polo, on Flickr
IMG_3675 by Jon Polo, on Flickr
IMG_3681 by Jon Polo, on Flickr
IMG_3671 by Jon Polo, on Flickr
IMG_4393 (1) by Jon Polo, on Flickr