I understand your frustration.  I agree with Steve in showing the client the indices that you are checking.  I am sure once you explain to the clerk that you need a copy to show your client that they will allow you to make your copies.  Especially since you have been in those court houses so much.
     I would have your attorney draft the certified letter "a growl letter", lets those know you mean business, especially when it comes from an attorney.  I would back sure you have the evidence and those willing to testify to back up the slandering, prior to taking any legal action.
     However, I would not post fliers.  I believe that would cause more problems than it would solve.

jmho

Jay