Seek another mechanic's opinion, what if you replace the part and the sound is still there? Better yet take your car to Cruven or any suspension specialist for further examination.
You may visit any of their branches and let them try to pinpoint the origin of the strange sound. A test drive with one of their mechanics would be ideal. Lots of tsikot members have good feedback about their business. I would think that they charge their customers fairly, or else people won't leave good feedbacks.