I do not have a Kitchen Aid, but I know that many people at Nebraska Kitchen do. I was reading an article from Vox about reduced quality in goods we buy today, and there was a link to a place that repairs Kitchen Aids and also has tutorials on how people can do some of their own repairs.
My son sent me something on this place when he was here, because our 50 year old KA was making a lot of grinding noises when Diane was mixing cookie doughs.