It's always sad to get this kind of news. I wish your mom first and formost happiness, quality of life and dignity.
As I'm half a world away I can't give any concrete recommendations. Your best Quack-antenna is trusting your basic b.s. detector. It's okay to talk energies, but every healer should have a working knowledge of anatomy, allopathic treatments, physiology and basic biochemistry. So, if you ask a healer why his or her treatment works, there should be a decent and understandable explanation. If it is secret mumbojumbo, it's probably baloney. Any healer that "guarantees" health is probably a quack, so are most healers that claim that they are the only ones who can heal you or healers that exclude other therapies. If a therapy is extravagantly expensive: be wary. If a therapyplan has to be complex beyond believe, be wary, because it's often a trick to blame any failure on the patient for not following the precise instructions.
The truth it your mom will have to educate herself first and formost, learn what is happening in her body, learn to feel how her body really feels, what parts feel "sick" and what parts "healthy", does she feel confident and strong, or scared? What treatment feels good, what doesn't? She has to develop her own intuition beyond anything else, because every cancer is different and every body needs different healing techniques.
The biggest question is: does she really want to live, even if the path back to health may be long and hard... Some people are just "done" on this plain, and a worthy exit may sometimes be more healing than battling to regain health. What does your mom really want? How does she want to live? What regrets does she have?
For starters, I can recommend the following websites (although as always: every-one sells bs every once in a while, so remain sceptical)http://www.drweil.com/http://www.mercola.comhttp://kriscarr.com/
Again: blessings to your mom and to you. Stay strong, stay together, keep the faith.