Frankly, it would be best if anyone in the organization is currently working with a lawyer; that might get you a referral. Free work is always easier to do if it's related in your mind to paying work. If there are any "umbrella" organizations in your area (United Way, or maybe Leave a Legacy if that survived where you are) you could talk to them. BTW, you're going to need to pay a user fee to IRS for the 501(c)(3) app, so you are going to need a few bucks to make this happen.
Answered on Dec 26th, 2013 at 9:52 PM