I vaguely recall folks running into this issue with the Hotchkis sway bar up front, but I don't think I've seen anyone complain about it with the stock bar. Any chance the previous owner(s) put bigger sway bars on it?
If you google for "sway bar collars" you'll find options for 2-piece metal clamps that bolt on around the sway bar. They get installed to the inside of the bushing mount, and prevent the sway bar from shifting side to side.