There are fellowships out there for public service that are, supposedly, more contingent upon past public service experience and other "soft" factors than grades. In fact, I'm not sure if the last fellowship I applied for even asked for grades. I know I didn't need a transcript. There are PLENTY of opportunities with legal services, public defenders and possibly small firms. It's doubtful that you'll get paid, but there's lots of stuff out there if you're interested in pro bono work.
Make an appointment with career services or scour their website for fellowship opportunities. To find places to apply to, use Martindale-Hubbell on Lexis and of course career services. Good luck!