Unless the person is a celebrity or some other public figure with not expectations of privacy, then the OP would need to have a signed release from the individual allowing the artist to use the photographs and likeness.

There is a plethoria of celebrity (or near enough to the mark) morphs for V4 here in the Marketplace.  There is a 70 plus page thread over in the DAZ forums covering celeb morphs.  Since the OP isn't giving the usual "does anyone know where I can find or morph of x celeb for y figure" I'd be willing to hazard a guess the person they want the morph of is not a celeb.