In Battles and Leaders of the Civil War Volume 1 .pp.160-165 by Constance Carry Harrison related how with help of cousins Hetty and Jenny Cary each made a CS flag-one for CS Generals Johnson; one for Beauregard and one for Van Dorn.
2 are accounted for:
Beauregard's appears in Confederate Veteran Magazine Volume 24 1916 .p.197 at http://books.google.com/books?id=ZEEOAAAAYAAJ&pg=PP5&dq=Confederate+Veteran+magazine&lr=&cd=8#v=onepage&q=Carey&f=false {It ended up with the Washington Artillery of New Orleans}
Van Dorn's was returned to Constance and appears in B & L Volume 1 .p.160 at http://books.google.com/books?id=8C4OAAAAIAAJ&pg=PA160&dq=Virgina+Scenes+in+61&lr=&cd=1#v=onepage&q=&f=false

What happened to the one for Johnson?