Have you noticed the same vibration while braking? I would get the dial indicator out, for sure.

After you satisfied your scientific curiosity and verified any run-out in the rotors, I've have a second opinion. My experience with dealers and now an 'old' vehicle, in the 2013 Toyota case, has been less than stellar.

Are there dedicated alignment and front end guys near by?

1988 Mighty Max turbo 2.6 service body
1980 Power Wagon W400
Sundry Mitsubishi Montero Gen 1 parts, Gen 1 and Gen 2 Max parts
Parts vehicles: 89 LS Montero 4-door, 2002 Sport AWD
For Sale: #277 Montero