Wish I could help out here.. I found my lawyer through a friend. Though, in Illinois, FOIA pays out a decent amount if you win a FOIA suit. Finding a lawyer to help out might not be that hard if similar laws exist where you live.
If you can't find a lawyer, find someone locally who knows FOIA very well. Lots of activism and open data crowds have loads of experience with it.
How do you do this?