I am looking for an attorney specializing in licensing agreements. I have a patented lawn tool innovation I am shopping around large manufacturers.

Check with your county voluntary bar association to see if they have a lawyer referral service for licensing.

Most intellectual property law firms have at least one attorney that is knowledgeable about patent licensing (my firm has more than one) so it should be easy for you to find someone if you are willing to pay for the attorney's time as opposed to expecting the attorney to obtain his compensation from the proceeds of any licenses that are obtained.