Frederick,
One of the 18th Georgia flags that survives, in private hands, is not an ANV Second Bunting but, rather, it is one of the ANV wool/cotton flags with 12 stars made in May 1862 by a Richmond sewing circle. This bears a lock of hair from a soldier of the 5th New York Zoauves who the 18th Georgia, then part of Hood's Texas Brigade, shot to pieces on Chinn Ridge at Second Manassas. I have seen the flag in person and it is shown in the Time-Life "Arms and Equipment of the Confederacy" book. A 12th Georgia diary also has details of the flag.
Greg Biggs