I got lucky with this cause my dad was in the military and had few pairs of pants that fit me that he gave me, but as for the shirt I found one Combat shirt on Amazon https://www.amazon.com/dp/B01L7P140G/?coliid=I3TDBLE488IH6M&colid=8MTK7T7LJC1E&psc=1&ref_=lv_ov_lig_dp_it
Reviews seemed good and it seemed cheap, figured couldn't be that bad. But I haven't actually used any of my gear in an event yet so I can't confirm it'll work well in any kind of event.