Are their any knowledgeable Mechanical Engineers or Metalurgists on this forum who actually know what the alloy and heat treatment of sway bars is?
I have some solid round bars of mild steel , 3/4" to 1", that can be bent into a "U" shape to fit. Of course something has to be done to the ends to attach the two vertical links. However, if a plus or minus 30 degree torsional rotation causes mild steel to yield, there's no use wasting time and material on it.