The easiest place to find what you're looking for is in the book
"Collecting Musical Boxes and How to Repair Them", by Arthur Ord-Hume.
On Amazon.com are a number of the books at a very reasonable price.
If you have a problem I'd be happy to try to talk you through it.

Nancy Fratti - Nancy Fratti Music Boxes
Canastota, New York
http://www.nancyfrattimusicboxes.com/