It honestly would probably take anti-rejection drugs and stem cell impregnated strategically scaffolded tissue from a highly compatible donor with a cocktail of other drugs. The process would be horrendously expensive with a high rate of complications, but the plus side would be endogenous hormone production and natural function should it be a complete success.

Some sort of crazy unpleasant gene therapy derrived from a parent or sibling over years would probably be more viable sooner, but time will tell on that.