Hey Mate,
I had a 36kg spanish done about 18 months ago by Rod Gardiner. He is from yamba in northern nsw so probably a bit far for you but he did a great job. When I caught the fish it was in hervey bay so a big ciguatera risk thats why I had it mounted. I just wrapped it in glad wrap and froze it whole He picked it up and dropped it back off to my house when it was done. It is a pretty time consuming process as they have to skin the whole fish even down to eyelids and fins they then make a foam body form and tan the skin then wet fit it to the foam body form. when it has dried they then airbrush some colour back in and clear coat it. My fish cost $700.00 to get done. Have a look at his website my fish is in gallery 6 there is 2 spanish on that page mine is the one inside the house. his website is
www.taxidermy.net.au
Cheers Lochie