I'm absolutely NOT convinced.

I'd start by putting a dial indicator on the rotor. Mark it with a sharpe and measure the high and low spots. Then do the same thing to the hub.. If it's the hub-they will be in the same location. Since there is a allen retaining screw.

I'd take the hub off an closely inspect the bearing races to make sure they are seated properly-maybe someone replaced a brg and didn't seat the race *or* nicked it or created a bur.

I won't go into other things that could give a pulse since you've honed in on the brake rotor/hub. Hope that helps!

Michael

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Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E