I didn't check out the links and it's way past my bedtime, but wanted to post real quick in case it will be helpful.
a few things I would look into are
a) diet of course, alkaline foods and other healthy aspects of food
b) along the lines of alkalinity, I read something about cancer not surviving in a certain level of alkalinity. a couple things that I've read a little about are DCA and also simple baking soda. I don't know for certain or in detail for either, but I think it's worth looking into
c) EFT (emotional freedom technique, or also referred to as ESM; emotional self management, in the book Instant Emotional Healing that I read) aka tapping, innumerous links through google and also plenty of youtube videos posted by believers who want to help spread the gift... I wouldn't note its primary use as for cancer, but I believe it can heal all sorts of things
d) thc, as I understand some compound(s) of marijuana have been proven with promising results to combat cancer
it seems you are pleasingly aware, but as that's all I can think of for now I'll just say a few things I'd stay away from such as tap water, parabens, aluminum, sls, hfcs and aspartame
and lastly maybe some crystals and gemstones would be helpful to you both