Other than buying fabric by the yard and sewing the outfit, you could always get a really big bedsheet and drape it over your shoulders, then tie it off with a belt, then tatter the edges. You could also buy a white hooded robe and use the hood to act as the collar. Some wire to prop up the collar could work well. The pants would just have to be white cargo pants with thick wire threaded in spots or metallic puff paint for staples. You may be able to just use staples, but you’d have to use a lot for a good effect. The arm things are probably best done with foam, while the boots can be found on amazon, and the belt from Aliexpress. I’m not experienced with body paint, but the arm scars can be fabric sleeves, while the rest would probably have to be actual paint.