Funeral costs and support for wife and kids

My brother was killed in a car accident 12-18 on his way home from work when a semi lost control hitting him.  He is leaving behind 2 young children and a wife. He was the sole provider for the family and they were still recovering from the loss of there youngest child. I’m asking for any help for the funeral and cost to help his wife and kids during this time. There Christmas is already going to be so hard with everything. He was such a wonderful Father, Husband and friend and would have done anything to help anybody.