Shanko

Greetings. I am brand new here and have built my own armor using EVA foam, but I have 3D printed since then. I can print full-size helmets, armor etc. no problem. The issue I am having is getting the undershirt, neck piece and pants. I have a sewing machine also, but short of sewing my own from scratch, can someone point me in the right direction for getting these undergarments or the accepted material to use? Thanks in advance