For T-shrit the common white shirt are 1930's 40's. Hanes ect at K-mart ,Wart-Mart. The white "wife beaters" are also what you can get too. I have a red colored wool bunt T-shirt from WW 2. It is a original from the 100th Infantry Division from their baseball team. That style is no longer made, very short sleaves, almost half the size of modern ones.
Pat, 99th I.D. , Erie .PA