hmm, maybe a simplicity sewing pattern (or another brand lol) of a pair of coveralls, or a ones-y(spelling?) pajamas pattern. and then just not do the arms. or even white painters coveralls and dye them yellow. best thing about the "morbid idea" is that if you use a modified suit of sorts it could look purposely "wrong"...im not sure if that makes sense(im at work and people are talking all around me and I cant concentrate haha)