ZOMBIE lost & found

Blurb: Fifty years after the zombie apocalypse, things are starting to return to normal, for the zombies at least. Fred is a former heart surgeon reduced to running the zombie lost and found department. He has a secret plan to carry out the first zombie organ transplant, to replace his lost manhood. What he doesn't expect is for his new part to have a mind, and sexual orientation, of its own. When he is transferred to provide medical care to the immune-human reservation, his wayward dick gets Fred involved in an incompetent human uprising. What does a respectable zombie have to do to have a quiet life, get laid, and bring about a new world order?