I forgot - the 2nd/6th Missouri flag is in the collection so the Missouri State Museum in Jefferson City.
The Army of Tennessee adopted special corps designating flags in 1864 - Hood's and Hardee's before the Atlanta Campaign and S.D. Lee's (Polk's old corps) after the campaign. These flags were for the corps, divisions within the corps and brigades within the divisions. I have drawings of all of them done by an AOT veteran and will have to dig them out to find out what one represented Cockrell's Brigade.