Artizan came close with their recent Special Service Force/ Devil's Brigade figures, if you can live with pistol holsters and shirt cuffs. Alas they are packaged so that there might be one or two figures in shirts in each pack with the others in various types of jacket, M-41 Parsons, tanker jackets etc. Puts me off buying them. Had they done a packet in shirtsleeves, another in jackets etc they would be far more tempting.
If you fancy a fair bit of filing and some fun with green stuff, then their US Infantry could be used. File off the gaiters, green stuff to extend the pants and you'd get a reasonable figure, many of the packs are in shirts. Lot of work if you are planning on a platoon's worth though.