This is from a woman named Judy, who just became a member today.
Yes, I got a PM from her and we have made contact. She has evidence to believe that her Uncle was a member of the 339th 'Polar Bear' Regiment. I wrote the current historian of the Polar Bear Association to see if he finds the name on a roster. He has finished a manuscript on the history of the 339th Regiment but can't get it published.
{Edited to add Update}
I sent the info about Judy's uncle to two of my friends and asked for help. The first person is a genealogist who is good at finding families, burial sites and interestingly, WW2 Enlistment Records. She found a reference that identied the soldier was a member of HQ Company, 3rd Battalion, 339th Infantry Regiment. She also dicovered the soldier had a famous uncle---his uncle was Big Louie who stood at 8 feet and 4 inches tall. Of course, Judy knew this bit of family history.
The second person is the Historian of the Polar Bear Association. John located a WW2 roster that listed this soldier as a member of the HQ Company of the 3rd Battalion and included his full Name, Rank and Serial Number. So, I consider the case closed as they confirmed that her Uncle was in fact a member of the Custer Division. Now Judy has info that will allow her to do much more research into his unit and look for General Orders that may tell about what he did.
BTW, when I was reading GO's at the Archives, I found some Bronze Star Medals issued to clerks in the HQ units who were written up for their dedicated service. Nothing mentioned about being in combat.
Steve