This is terrible news.
You have my condolences. If you feel that you can't get a yorkie now, you will change your mind in time. Let yourself heal first. No puppy will be the same as Maxx. I wouldn't hold this against the breeder. They had no idea. Yes, they knew he was sick and did provide the meds for him. Even if they had taken him to the vet whos to say that the vet could have saved him...especially if he was too far gone with the pneumonia.