Cowboy Cadillac
Ain't no trash in my trailer!
Try www.tuffyproducts.com I know they sell lock boxes for guns n suck for Jeeps...maybe you can use one and modify it to fit you rig.
Kinda like this one.....
http://www.tuffyproducts.com/p-285-248-tuffy-tj-lj-conceal-carry-security-drawer-no-flip-seat.aspx
Kinda like this one.....
http://www.tuffyproducts.com/p-285-248-tuffy-tj-lj-conceal-carry-security-drawer-no-flip-seat.aspx

I don't really know where else to put it. So I keep it in the holster and put it in the door panel.