I found a third roll seat out of a older Chevy Suburban with the seat belts integrated into the seat. Angles were made to mount the front and back of the seat. I used the cargo hooks mounting holes to attach the back of the seat to the floor. The feet at the front of the seat align with threaded holes in the cargo floor. The false floor was removed. A cover was fab with a couple of access doors. The front mounting angles are easy to fab. The back mounting a little more complicated.