My sincere condolences to you and your family. My wife's Mother, Father and Aunt all succumbed to Cancer and although they weren't "family" I was very close to them and it had a profound impact on me. When you're ready count me in for a donation as it's a good thing you're doing and my hat's off to you.
I actually have been discussing with the place that takes the hair about donating to them. They do mobile work and help patients out. The more I read their website, the more it touches my heart. I lost my father to lung cancer so it really hits home.