Whoa! Stop! Did you have the suspension checked? Are the spring hangar plates and bushings worn?
This can do the same thing and is MUCH more common than a bent spindle.
I would have the suspension checked.
One easy test to see if your spindle is bent is to jack up the axle in question stand something up that has a straight edge against the tire and rotate the tire/wheel. A bent spindle will result in the outer diameter of the tire to scribe an elliptical course and hit the straight edge.
With the weight off the suspension a bad suspension will not affect this.
Be sure you arent spending a lot of money where a $100 fix will do it.