It pays to double-check your info. Charles F. Stewart can also be reached at 121 W. Washington Ave., Covington, TN 38019-2557 (note zip code). His phone has been changed and the new number is apparently unlisted. I have no info as to how - or even if - he is involved with the association.
When you contact Biehler, Arthold &/or Stewart, inquire about placing a personal in the association's newsletter, ORION GALLIVANT. Also, before you get your hopes too high, the association - both battalion and divisional - is a private organization and will only have info on those who have been members or have been otherwise involved with the association.