http://books.google.com/books?id=FoYvAAAAYAAJ&pg=PA18&dq=Union+flags+captured+at+Seven+Pines&hl=en&ei=RGW2ToXgHIyFsgKZkdCDBA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CFoQ6AEwCA#v=onepage&q&f=false
Has about 96 Confederate flags listed, tons of other battlefield items.
Enjoy!
Shawn Prouty