Here is my version of a homemade rear seat delete for much cheaper than the vendors sell with parts from Homedepot, Pepboys. Total weight loss 27.5lbs
Parts needed:
Large Pieces of cardboard leftover from racing seat boxes - Free
Chloroplast Sheets homedepot 1 large, 2 small - $20
3m Spray Adhesive - $10
Large Black roll of carpet from Pepboys - $30
Larger/Longer press clips things Pepboys - $3
Sockets set - get your own or borrow from neighbor with beer
In usual fashion I start by weighing everything taken out since the purpose of this is weight reduction.
Everything out pic
Seat back ~14.25 lbs
Seat bottoms 4.25lbs each for total of 8.5lbs
Seatbelt equip/ brackets/ bolts 11.25lbs
Total weight removed 34lbs
Can't say I came up with this myself there was another forum member who made his out of cardboard. My version will be backed with a layer of chloroplast lightweight sheets from HD to get a more solid yet lightweight structure.
Cardboard Template

Mating up with trunk connection points
Adding the chloroplast sheets over the cardboard using the spray adheasive
Covering everthing with the carpet
All the pieces being weighted got 2 cheap pillows from Walmart to use as a cheap lightweight sound deadening for each seat bottom area. 6.5lbs going back in the car. Net weight loss 27.5 lbs
First install you can see the area where the carboard flexing got wrinkly this is unacceptable. Also the top shelf was not clipped down tight enough either
Made a piece with remaining chloroplast to fill in that area
kit uses the stock mounting bolts too
Final Shot