The only thing they can do is try to use colon tissue, but that is super drastic and they only tend to offer it for people who cannot dilate at all. Almost no one is desperate enough to do that operation because the colon tissue still makes mucous intended for the colon. It smells bad, like butt. Very few males are depraved enough to fuck such an orifice, and that's all its good for.
The doctors are going to tell kevin that amhole is just fine, and by the standards of frankevagina, it is. He isn't the worst off from this operation, not by a mile. His neovagina isn't full of hair and he doesn't have any fistulas, the doctors are going to treat him like he is a whiner. The procedure is not good, nothing can make up for that.