Feeling your frustration on this. I’ve had my is200 since it was one year old, and have only had this issue very briefly when I put new (Lexus sourced) front discs on. It turned out that some corrosion spots on the hub were just enough to affect the runout, I properly cleaned the hub and the problem went away. My issue has always been a knocking noise coming from the drivers side front suspension, never got to the bottom of it.