Al,
Hankins book, which was originally a series of articles in the "Confederate Veteran" magazine, has been reprinted recently I believe, but it is published online in full at the website below:
http://www.rootsweb.com/%7Emscivilw/simple.htm
You'll find the uniform reference early in the Preface. I don't believe there is a lot more discussion with respect to this particular uniform unfortunately. I extracted most of the relevant material in my original quote.
Mike