For replacement parts you can try kohls.com. They occasionally have good sales!
Back to the thread (and I know I'm in the minority on this):
I find the KA awkward to use. I'm short, and it's tall. I think it's difficult to scrape the bowl and the beaters; it doesn't have a small bowl for small jobs; it takes up SO much room on the counter (I call it my monstrosity); and the beater has to be removed if you want to remove the bowl. To me, everything about it is awkward. But, I admit that it works very well, and gets the job done quickly.

I just bake for family, so I don't need a large capacity mixer. I miss my Mixmaster!