May I suggest you contact the Butler Center in Little Rock,
attn: Brian at brianr@cals.lib.ar.us.
He may be able to help you or suggest who might especially when you explain your project.
Truth be told, most of the kin and or descendants probably do not have a clue where the men fell in battle.
I have always heard that my ancestor James T. Harper of the 5th Tenn. who was wounded at Shiloh, was wounded again later in the war. We think it was Georgia.
Good luck with your project as it sounds like a wonderful thing to do.
LInda