Funny you should ask. I just happen to have a few. http://www.lawyerlinks.co/ http://www.lawdirectory.co/ http://www.deeplinklawdirectory.co/ http://www.deeplinkdirectory.co/
There's http://www.absolutely-australia.com.au/directory/ which is an Australian only directory and I stress the sites submitted must be Australian or they will not be accepted.
Not an established one -- but a new start-up with lots of link developments both to the site and on the site -- here is one www.lawyerdir.org