On my Tamiya M26 Pershing model, the included figures are dressed in buttoned-up tunics. However, a picture of an actual tank (during the Inchon landings) using the same Korean War markings as Tamiya's show the tank crew lightly dressed in T-shirts. I have seen no 1/35 figures of anybody in T-shirts when I've looked so far. Is there somebody I missed who does supply them? Thank you.

Academy's M113A2 kit has a t-shirt clad soldier in a CVC helmet. They figure could easily be modified though since it is split into torso, legs, arms, and head as all separate pieces.

I think there was a t-shirt clad figure in the Tamiya M60A1 ERA kit form ODS as well. He is a one piece torso-legs-head affair with separate arms though.

Good luck.

Yanks Miniature do a nice seated figure in a T Shirt, A marine Dog Handler, You also get a Doberman



Photo is slightly out of focus, my fault. Here it is on the Yanks website

EDIT I've just noticed that their Code 9708 M3-75mm Gun crew x3 has a T shirted figure and a bare chested figure too.



Also, in the Verlinden Marine Tank crew set one of the half figures is wearing a T-Shirt

Thanks for the help!