I'm so sorry. Have you tried calling him? I'm not sure if there's a way to tell if you've been blocked when calling or not. Does he just have a cell or does he have some sort of office phone? Option d is to mail him a letter, though that would take a little time. Or, I suppose, drop it at his office, if it's someplace other than his house (if his office is at his home, that could be problematic).