The US Army Military Institute at Carlisle Barracks, Penn. has a large collection of photos.

You can go to their website and check out what they have in their CW Unit Bibliographies on the 9th and 11th Tennessee Cavalry, USA units.

Many times in these listings they include what they have in their photogrphic libraries for men of these units.

If you have no luck there, contact them directly.

Good Hunting,

George Martin