Umm, isn't the entire swaybar/end link/mount setup the 1st thing to look at with a front end rattle? It's all easy to inspect. The swaybar and the mounts/links are constantly being flexed and resisting relatively large forces, so it's all failure prone compared to the more robust parts in the rest of the front end.
Ford had recalls on 94-95 Mustangs due to sway bars that broke from the constant flexing. At least we don't have torsion bars for springs like the 10th gen trucks had. They all fail eventually from metal fatigue and last I checked, the junkyard was to only place to get "new" ones.