The important dimensions are where the lip seal is, the radius on the shaft for the back of the inboard bearing and the diameter of the shaft where the bearings run. Until those are checked you don't know how well the bearings would run. That lip seal area is damaged and may damage a new (double lip) seal. There is a thin sleeve called 'Speedy Sleeve" available at bearing distributors that fits over the seal area and provide a smooth place for the seal to run.
IMO, the dealer shafted you and should replace that axle. If it were mine I would replace the axle
2013 Crusader 330 MKS
2013 Chevrolet Silverado LT 2500 D/A