Capt. Sir;
The book "Arming & Equipping the United States Cavalry, 1865-1902" is an outstanding source book. It follows the induction of all modifications of all arms and equipment of the Indian wars period. It also shows what equipment went to what units from Quartermasters records. You'll enjoy and find it hard to put down.
Zouave Officer, Sir;
The Book is also availiable from "Trapdoors Galore", I got mine there last year.
Another great sourse set (2 Volume set) is "Uniforms, Arms, and Equipment" by Douglas C. McChristian it deals with the Army of the Western Frontier 1880-1892. Vol.1 deals with Headgear, Clothing and Footwear- Vol 2 deals with Weapons and Accouterments.
I hope this helps and is what your looking for.
Respectfully
1st Sgt.