Well, Starr, you can't just walk into a doctor's office and request such a procedure and get it. Processes like fat grafting, transplants and any other medical procedures have to pass years of peer discussion as well as approval by medical associations and, perhaps, legal entities. Even if some doctor was willing to try that it would easily be 5-10 years before he could. As I understand it, most doctors even discourage fat grafting from the same person's body because of various risk issues. I doubt you'd ever find a real MD who would consider such transplant.
I agree with you that conventional silicon implants often come out less than ideal in appearance, though many do, as Playboy magazine likes to demonstrate. Realistically, that's probably going to be your only real option.
~ Lyric ~