These two sources may have occurred to you.

First, Civil War newspapers and post Civil War. Have you tried using newspapers.com?

Second, Peter Wellington Alexander collected Documents from the confederate war department. They have been placed on microfilm at Yale University. My friend Mike Banasik has a copy of the collection and is very familiar with it. There may be material there that will help you

Please email me at StreetStories@Juno.Com

Bryce