I've got a bent one hanging in the garage. When I look at it, one side 'droops' a bit more than the other. It's actually bent across the front straight part, from the PO using it as a tow point. Have a broken slot in the a-arm to go with it.
Some checks: When you lay it on the ground, it should be flat -- probably within 1/4" or so. If you put a straightedge across the 'leading edge', that edge should be pretty straight. Measuring from that straightedge (extended imaginary line) to the ends of the bar should be the same on each end. I'm not sure that the one I have in the garage is the best candidate for telling you what that measurement should be.
My un-researched guess is that they could be straightened/bent back to norm, as the spring action comes from the rotational torquing of the bar. I'll be trying to straighten mine in a 20T manual shop press. Only trying this because it doesn't look like I need to re-radius the curved bits; only to straighten the straight bit. Probably should be bent cold, so as not to disturb symmetry of flex. Could be either pleasantly or unpleasantly surprised when I get to it in the spring.
If you have good access to the undercarriage, some patience, and a few tools you could determine the necessary angle from the geometry of the front suspension itself. Straightedge, clamps, (digital) protractor, perhaps some string or straight bits of wood. Map the mounting holes, and measure the angles from a straight-across reference. Or, maybe, measure the angle of the side of your bar that does fit.