Heather, if I knew of any I'd send them your way... But what an intense and crazy story. I want to know what happens! Definitely KEEP THE CAMERA ROLLING. Stem cell research might be an unexpected subject for you to dive into, but given you have a totally engaging and spectacular subject that could be something of a dead end dramatically (BASE jumping), going into Maggot's accident and WHY STEM CELL RESEARCH IN THE US IS IMPORTANT, or more precisely why he has to go all the way to China (if stem cell research is indeed the issue) and wether he makes it or not, might catapult your project to another level.
This may be hard to come to terms with, but helping him get to China shouldn't be your main or only focus. You are a filmmaker, so FILM WHATEVER HAPPENS. Either way you have an extremely powerful flesh and blood example of the real implications of bigotry and narrow minded science policy. Listen, I could go on with this for hours but you shouldn't be reading this. You should be filming Maggot and his doctors and everyone who cares about him and is trying to get him to China.
I don't know, maybe you don't want to just ditch your BASE subject. I'm sure there's a lot more to it than Maggot. But I know that if you manage to combine the two, or rather to start with one story that suddenly, brutally turns into another, it will not only be a faithful record of your experience as a filmmaker, but it will also be a much more powerful film. One that more people will care about and one you'll get more funding for, short or long term. Try stem-cell advocacy groups, they might have ideas.
A quick search brought these up:
And there's a handful of docs on the subject that could probably point you in the right direction.
Maybe if you can convince one of these groups of how powerful an advocacy tool your film would be if you could show how stem cell research did indeed save this person from paralysis, and that he had to go all the way to China to get it, they might help you find the money for the trip.