Your confidence in the dealerships is misplaced on vehicles that are 20 years of age. I have personal knowledge of the staff at the dealership 20 miles from here and there are possibly two individuals who can remember anything about these vehicles. Whether one of them has any experience in troubleshooting a front suspension issue is a total crapshoot. Your response from the dealership will be classic:

"Sir, the entire front end of this vehicle needs to be rebuilt. The cost will be approximately $2800."

You'll never find a tech at a dealership to diagnose a front end shimmy down to a specific component.