No such thing.
Breast growth is a process and takes generally a long time no matter what your genetics. The main thing that your genetics do is to determine your maximum sustainable size.
There's also really no such thing as a miracle pill that will just magically make boobs appear.
Breast growth for biological males is a combination of suppressing testosterone and raising estrogen and progesterone. Mega doses of estrogen and progesterone CAN also do the T suppression.
The fastest growth I've ever seen is from cros, check the pictures subforum of this one for his thread... He's doing a combo I think of a topical and PM pills internally. He might also be on SP, I'm not sure.
I expect to grow pretty quickly as well once I get started with my own plan, but...
As I said, there is no "miracle" fix here. Whatever method you use, you need to be careful and try to keep your system balanced.