My gut reaction is, no. FOIA requests are usually for government information not private information restricted by mutual agreement of two private parties. You could always try. I am not sure what good it will do, other than satisfy your curiosity.
I am sure people who have posted on this site know what was in those documents (and no, I don't mean BenLurkin). It is a bit irrelevant at the moment. The receiver has the ultimate power. I don't even think you could bring a derivative suit as an aggrieved shareholder at the moment. I have faith in the receiver. For the first time we have someone whose only interest, as the court appointed receiver, is to maximize return for the shareholder. If he fails to win, he, like the rest of us, gets nothing. So I am content to let him play this out the way he thinks it should go.