Be assured of our prayers, as well,
CathMomof7. I lost my mother around this time last year, and while conversion wasn't a problem, finding a priest was. One came to us quite miraculously, and while he couldn't light candles, he said many prayers (and sung the Litany of the Saints); everybody agreed Mom responded so well to this priest (that it wasn't just my imagination), that miracles were done.
I pray you can find an empathetic, traditional priest who will pray for her, as well as for your family's strength through this most difficult time. As terrible as the matter seems, there is nothing like seeing a spark of light when a priest sings the Litany of the Saints and other ancient hymns and prayers during this time, both for your mother, and for you and your children. From our experience, it was almost as if the priest spoke to the soul of my mother directly when nobody else could. I can't explain it. It just is. So I pray you find such a priest.
Your mother and your family are most certainly in our prayers, and if you want to drop me a PM with her first name, I'll also enlist the prayers of a convent of sisters who seem to attain miraculous intercessions.

SGC