I'm so sorry to hear about your puppy.
My family and I were able to nurse our Parvo puppy back to health all on our own.
What we did:
My family has owned 4 puppies and this was our first Parvo one. It was very scary so I know how you feel. Our guy was sick for about 2-3 days before he started perking up and eating his own food again on the 4th day. He is now 4 years old, healthy, and thriving.
Feel free to PM me if you have any other questions.