This is a toughy - and I’ll say candidly that in 50 years of ministry I have not run across something that is useful and effective to minister to non-Christians who are bereaved by the loss of someone dear to them.
What came to mind when a distant friend asked for this kind of resource is my own experience in seeking something useful to manage the almost certain death of my own eight-year old daughter, newly diagnosed with a diffuse brain stem tumor. When she was settled into her room at her first visit to Children’s Hospital in Dallas, I asked to speak to one of the staff chaplains out of her hearing. I asked him for resources to guide a parent in counseling his child who was very likely to die from the disease that brought him to the hospital in the first place.
Would you believe that the chaplain had nothing to offer me? Sixteen months later, when my daughter was near death in a different hospital, a chaplain came by and I asked him the same question. Same non-answer!
And, this is for Christian children who were dying!
On one hand, I expect the resources to engage bereavement itself are going to lie mostly - possibly exclusively - with nearby family. Siblings and children. In the current case, a woman has lost her father and her husband in the space of two weeks. She needs assurance of love and commitment that in her declining years she will be cared for, protected.
Beyond that, I have nothing at hand to point my friend to.
So, if I’ve overlooked the kind of thing that might help (out in internet-land; or in print), please let me know. It won’t be the first time I’ve failed to see something in plain sight.