Well, today I came across this post from the Boston Modern Quilt Guild. Even we in Australia can help, we can send quilt blocks. Please read the post, it has all the info you'll need. There are specifics to take into account when making your blocks, but very reasonable ones. You just need to remember that they need to have arrived in the US by May 24th, very doable.
I know what I'm doing today, how about you!