Realism: Corpse Model (Urgent)

I need a model of a dead body of a bald man in clothes sitting straight up against a wall, legs straight outward, arms and shoulders resting position. The model doesn't need to be rigged, but it must look absolutely real with realistic proportions. the body is in a deep state of decomposition, with a white, dark grey, and yellow coating of decaying matter around the entire body. I'd prefer it to be in an .obj file and within 100k faces (if possible)