Make your own or have someone make it for you. I had seen some beautiful home made pine boxes. If buried within 24 hours you do not have to be embalmed. A vault is required at my families cemetery. I plan doing it the old way with coffin and vault. Buried on my back with my head facing west along with all my other ancestors. So as it says when he comes from the east and the dead shall arise etc. I am just too traditional. I am from the South where Decoration Day is still a thing to attend. Plus the cemetery bears my family name as it was started back in the day.
My very extended family does Decoration Day about three weeks before the family reunion for the closer relatives I go to. And as I am 700 miles away from North Carolina I always miss it. But some day I want to go.