With the risk of this thread becoming a wild goose chase, S/Sgt. Heller also received an Air Medal, dated 31 Dec 1943:
https://catalog.archives.gov/id/1394...ect-thumb--981
Please note that Williston is in ND, not SD.
Perhaps the 93rd BG Association (
https://www.93bg.com/) and/or 93rd BG Museum (
http://www.93rd-bg-museum.org/data/base.htm) can help.
Leendert