You might try contacting the WGA to see if they can be of some assistance. See registration and copyright .
Current membership is by invitation only.
Once all of our services are on-line, we will have a program for membership. Fees and qualifications will be made available at that time. For now, our focus is to provide you as much valuable information as we can without charging fees. I have written a bunch of plots or I have an idea for a script. It's highly unlikely you will get an Agent or anyone else to listen to you without a track record.