Illinois divorce attorney here.  Pick up the phone and call lawyer #1.  Tell her that you're unhappy with the how things played out, but you're willing to be reasonable and want to settle up with regard to the bill.  Make a good faith offer to settle for what you think is the right amount.  You'd be surprised at how much you can accomplish with a phone call instead of an email.

Admittedly weird question from a fellow 1992-93 5th Van Tyne resident: were you on crutches at the time?