J T, What's wrong with the body you have? You can change the way your body appears to others by diet and excersise. If it's just from age then I think you are stuck with what you have.
Has anyone heard of a body transplant? I may be interested myself.
Just the body alone is about $2500. If you want all the other parts (doors, trunk, hood, etc) the cost is around $4000.
Don