Stryped,

Here's a replacement
http://www.amazon.com/GE-5KCP39BGK335S/dp/B00413AT2Q
It's pricey but should be a drop-in replacement.
Google has lots of these. Do a little research to find a better price. I'm
amazed that your local appliance parts store can't help you out. The same
starter cap should be ok. No idea about your "acorn nuts" question but I
doubt any part of the model number speaks about motor mounting.

Dave M.