The 39th Infantry Reg definately had an unusal design on their helmets.
See below link
http://www.easy39th.com/history.php
WWII 9th units
The Division was reactivated August 1st, 1940 at Ft Bragg, North Carolina as a precautionary measure in preparation of World War II with the following units:
39th Infantry Regiment (From the 4th Division)
47th Infantry Regiment (From the 4th Division)
60th Infantry Regiment (From the 5th Division)
9th Division Artillery
26th Field Artillery Battalion
34th Field Artillery Battalion
60th Field Artillery Battalion
84th Field Artillery Battalion
9th Division Band
9th Medical Battalion
9th Quartermaster Battalion
9th Signal Battalion
9th Reconnaissance Troop
Headquarters & 9th Military Police Company
15th Engineer Battalion
709th Ordnance Company
I suggest you google the other units as Ive done, there may be lots of markings that you could use
Good luck with your search
Andy