If a spindle bearing were damaged, then you have little choice but to overhaul the spindle yourself, or pay someone else to do it. The trick is to be sure of where the problem is.
Is there any kind of gear train involved? The shock load combined with spindle momentum can bend or break a gear tooth, bend a shaft, or damage a bearing in the gearbox.
If you have a low and high range, compare the sounds of the spindle in either range, and see if there is significant difference.