Greetings from Orange County,
My friend, I am sorry to hear about your dad's condition. What you can do at this time is being with him all the time, you can contact clinical trial online asap and try to talk to his local doctors that he needs to be stable to get on clinical trial, they can use J - feeding or they can use TPN to keep him stable for a few months. I've lost a brother -51 yrs old as stage IV gastric cancer, I felt bad that I did not get him on the clinical soon until he was not stable and he did not have a chance to try it, but if you act fast he can have a chance to get on trial. The process takes weeks to complete the papers.
God Bless your family,