Linda found more than I was able to when I did a quick search, Kris.
Has Sarah asked one of the high school counselors or the head of Special Education? I would think if anyone has a nose for sniffing out those obscure scholarships/grants, it would be a counselor.
We also had someone at my old school district who worked on "transitioning" Special Education kids from hs to college. I'll bet she would have known about something like that, too. Is there someone like that you could tap?
Suz