Does anyone have pictures of there bed side tool boxes and a look at what they look like inside and underneath if possible. There's a truck in my new junkyard that I go to because they let me just roam around as I please

I would just look for myself but I don't want to lay in the mud

But anyways it has the bed side tool box and I'm thinking about just taking the door off and making the rest of the tool box myself for the 70. Has anyone ever done this?? Any help would be very helpful.