I also went the ammo can route. For mine I actually cut the ammo can up. I shortened it from back to front and from side to side so it would fit between my front seats and flush with the back of the seats. It is sized so it does not interfere with shifting into any gears, but down lower I took some of the chopped ammo can and made a "cupholder". I took the original handles of the ammo can and shortened them and welded them back on. I also drilled a hole in the top to put a locking mechanism from an old filing cabinet, and I took some half inch plywood, wally world carpet, and foam board I had lying around and I made a squishy arm rest for the top of the ammo can.
It is mounted to the body by angle iron that I measured, notched a 45 in it and bent it by hand. Basically I made a tray that the ammo can bolts to. Then I made two feet out of the same angle iron, cut them to height and welded the feet to the tray then bolted the tray to the body. Here is what it looks like from the top down. Unfortunately I didn't snap any pictures of when I was making everything. Here is what it looks like from the driver's side. I can take other pictures if you want to see.
Picture didn't upload. Let me see what I can do.