I have a 03 TJ Wrangler sport and I am looking to replace the current stock seats as they are not good for my back. Specifically, the built in lumbar curve is too much. Any recommendation on new replacement seats that have virtually no lumbar curve in the seats? I am also considering picking up seats from the junk yard that would have little or no lumbar curve and be a relatively easy swap. Also any new seats or junk yard seats that would have adjustable lumbar would be fantastic. Thanks in advance for any advice.