I'm talking about using a coil spring like these:
Isuzu Trooper Rear Coil:
![](http://www.4x4wire.com/isuzu/projects/roundtrooper/13.jpg)
Jeep Coil:
![](http://www.jeepspeak.com/_gfx/write_ups/s4.jpg)
4Runner Rear Coil:
![](http://www.downeyoff-road.com/images_parts/48231-03.jpg)
I am betting that I could just head to the wrecking yard and take my pick from hundreds of different spring rates and lenghts. Can't cost too much for just 1 coil spring