I did a few more things. I found a 3rd row seat from a Chevy Suburban (I think) that just un-clips for removal. I made some funky seat bracket that allows it to just "click and lock" into place. Tilts up for access to storage is easily removable.
My son has a 40 in about the same color scheme. Hard to find some of the parts for the 39s and 40s. I've found that they are awfully small for a big or tall man. good luck on the seating. He is still working on that