I've seen numerous worn front sway bar links, but they typically don't soun
d like they're coming from the front of the vehicle.
It's also a simple matter to check the rear sway bar links and bushings.
If nothing is obvious, it'll probably take some money to figure out. There
's a special tool (Chassis Ear) with leads that clamp to the vehicle, a con
trol box, and a set of earphones. The mechanic can then clip to various pl
aces where the noise is suspected to be originating. This may take several
iterations, but in most cases is rather accurate. I have seen a few cases
, however, where the sound echoes causing a misdiagnosis.