In fact, I doubt it really matters what the bar is made for. It's a basic shape that clamps to the rear axle housing with big muffler clamps (sort of) and you have to drill holes in the floor to make the front mount. Something a little more narrow might be an advantage. Something wider might not work so well. I'd almost bet the stock front bar from a 122 would work. I think the options are numerous...

And I agree with the other poster that if you don't have a limited slip, a rear bar might not be necessary. However...I sure like the big IPD setup on mine...