I've seen a couple other home builds of rear storage systems and felt like I could build one pretty easily for pretty cheap, so here's my go at it.
1- remove everything out of the back. Seat, seatbelts, mounting harware, even the carpet. (I later put the carpet back in to keep noise down.)
2- Cut a base for the box out of 1/2" CDX plywood. It's about 42" deep by 59" wide. I also drilled two holes that lined up with the 3rd row seat mounting holes to be able to bolt the box in the back.
3- Using a 2"x10" I cut the two outside uprights and the center I used a 1"x10".
1- remove everything out of the back. Seat, seatbelts, mounting harware, even the carpet. (I later put the carpet back in to keep noise down.)
2- Cut a base for the box out of 1/2" CDX plywood. It's about 42" deep by 59" wide. I also drilled two holes that lined up with the 3rd row seat mounting holes to be able to bolt the box in the back.
3- Using a 2"x10" I cut the two outside uprights and the center I used a 1"x10".

