Similar face to an elderly person

Hello, My task is to create an elderly human's avatar which looks exactly like him or her in terms of his weight, height, complexion and features. I should be able to modify them as well. I tried using Morph 3D by which I am able to import a female and male dummy and modify their weight, complexion, features, but, the results are not as similar as we expect. To solve the problem to make it similar to a human's 2D picture, I used NaturalFront 3D Facial animation plugin and made a face from a 2D image, this results in giving me an exact 3D avatar of 2D picture. But, I do not know any means of mapping this 3D model of face to 3D dummy body in MCS male morph 3D. I am not a coder. Hoping for some help. Thanks