When I put an aftermarket seat in my 05 Malibu it ran about $1,000 for the seat and a custom bracket to be fabricated so no cost break on the aftermarket side.
Possibly somone could weld the back into a fixed back at the desired angle for a couple hundred $.
Your not going to find a 2012 in a pick a parts place.
If you were feeling really adventurous find a car at an insurance auto auction with heavy damage and take the seat and part out the rest and see if you can make your money back.
This car has a certificate of destruction so it cant be put back on the road even with repairs.
$1,200 plus fees for the car, take the drivers seat, wheels look in good shape and would sell for a couple hundred at least, ebay any good body panels, etc.
There are a few sites like this, some require a dealer license, others do not, many times you can have a small dealer buy it for you under their license for a fee.
Hardest part is finding one close enough that transportation of the vehicle wont be a huge problem and a place to store it while you part it out that your wife/landlord/parents wouldnt kill you.
I will add that I have never done this but know a couple people on the grassroots motorsports website that have.