Help us with our fathers cremation costs

My father, Nathan, passed very suddenly yesterday morning. He had health complications but we never expected this anytime soon. His wishes were to be cremated, and those funds have been put on us, his kids. Because it happened so unexpectedly, we do not have the money to put into his cremation. We all have medical problems, kids, and struggle financially so any help would be very appreciated that way we can put him to rest the way he wanted.