As previously mentioned, if you have a class 1 you do still need a class 3, but it's really no extra hassle. I had a class 1 and just got my DAME to include a class 3 when I had it renewed. You could do it that way if your renewal is coming up (then Airservices will reimburse you for the consultation part of your renewal - winner), otherwise I would agree with cadetkid and see if you can't go straight to the source and talk to CASA.