Help me save Monty!

I brought Monty home a few weeks ago and he has brightened my life beyond belief. He is a chill puppy who loves to be held and play with everyone. Within the past week he has shown signs of a brain injury and on Feb 19th, he had a major seizure after hitting his little head on the floor. He needs a battery of tests including an MRI which runs $3500 then should require surgery which according to google costs another $5-10k. I have pet insurance but I am inside of their "waiting period" so this won't be covered. I don't like asking for money, but I have no other choice. Please help out or please share if you can't.

Thank you so much for reading,

PJ