Sound travels through the body in strange ways so try the hood bumper and latch thing anyway.

It's also been reported in the past that the sway bar bushings can squeek if dirt gets between them and the bar. Get thee some silicone spray with extension tube and spray between the bushing and bar.

Alternatively, you can spray control arm and shock bushings too. Be careful not to get the silicone spray on the brake rotors.

Rubber and silicone spray..... 'mmm good!