I'd suggest contacting a large cancer treatment hospital -- some place very well-known, like Sloan-Kettering in NY, Dana Farber in Boston or the Cleveland Clinic (I know there's a comparable place in Houston, but the name escapes me). And then start asking them, see if your relative can get in for a clinical trial. The drug is very new and still in the experimental stages, although it shows great promise.
I'd Google top cancer treatment centers
(I don't even know if you're in the US, sorry if I assumed incorrectly) -- here's what I found -- http://health.usnews.com/health/best-hospitals/cancer-hospital-rankings/
Personally, I'd contact them all -- what the hell -- and see if anyone can help you. Be prepared to travel. If you're in, say, New Hampshire, you may still end up going to Houston or wherever. Just go wherever they can take your relative.
I'm sorry she's so ill. I hope you can get in for a clinical trial, or at least she can get some peace. Best to you.