You can also try Greg from Unique Auto Tinting. He's based in Westleigh (close to Hornsby) but does a great job and excellent prices. In fact, I just booked the Wife's 350Z in next Sat. And he does still honor his Skylines Australia discount - after all these years!
He did my GTR back in 2009 and true to his word, the tinting still looks like the day I had it done! Impressive!
I highly recommend is worth the trek.