Chickamagua after battle report:

Report of Col. Van H. Manning, Third Arkansas Infantry.

. . . I have before this furnished a list of my killed and wounded . . .

Respectfully, &c.,

VAN H. MANNING,
Col., Comdg. Third Arkansas Regt.

Source: Official Records
CHAP. XLII.] THE CHICKAMAUGA CAMPAIGN. PAGE 512-51
[Series I. Vol. 30. Part II, Reports. Serial No. 51.]

………

Again, his list of killed and wounded is not found in the Official Records.

I would believe a visit to the National Archives in Washington, DC might be worth your while.

I suspect that these lists of his, Gettysburg and Chickamauga, might very well be found in the bowls of the NA. I would advise you query the Old Army Archivists there as to their availability.