Could we be told which Model you refer to. Someone may know better about parts availability.
Our Hotpoint Aquarius is older and had new brushes fitted for £20 recently. I had thought it was a goner and felt it did not owe us anything as it was old and I would have replaced it. It had a set of roller bearings fitted by the same Engineer about two years ago.
It may be I have a good engineer to call on as he does not charge for call out. He keeps fixing it so we leave it to him to make the decision, fix or no fix.