I think the approach only requires leg length added. The boots might be enough but if you could extend the legs (yeah, a bit of sawing at the thighs and/or calves might be a pain) to me the heads are less of the issue although they look a bit fleshy- perhaps a bit of rotary bur to rout out some gaunt high cheekbone definition.
Mrs. Frankie ought to be a bit easier, just give her more of a waspier waist with some cutting and add some length to the bottom of her dress..