Yes: my position is not a popular one, but I think there are many lawyers that I know of personally who would sign such a letter. I'm not sure that any group has been formed with the purpose of supporting the prostitution law, but I know from personal experience, in speaking to my colleagues, that there are many who agree that this bill is the right way to go.
Like I said, I know I'm not the most popular person amongst the CBA these days.