That is an unusual desire, but this is a forum for people who don't fit the "norm", for sure. The nearest to that I've heard was a very interesting thread by a poster here a couple of years back. As I recall, this guy had a cancer on his genitalia and it was necessary to completely remove them. He decided that rather than trying to reconstruct, he had the doctor create an approximation of feminine genitals. He didn't go on HRT or transition and, in fact, was married and went about his life as he always had. He did say that, understandably, there was quite an adjustment at first. I don't recall the poster's name, but if it comes to me I'll try to dig up the thread for you.
Any, I certainly agree with Izzy's advice of talking to a therapist about this. Actually, I suspect any ethical doctor would require you to before doing such a procedure anyway. Good luck and take care.
~ Lyric ~