I'm not sure if it's just my brain too adjusted to holiday mode, but I always thought that Year 11 Preliminary exams were often written by your own school, like an independent paper.
If you're like my school, they just chucked a HSC past paper as my year 11 preliminary exam. That would be good practice though
Considering what you're learning relates to Year 12.
But if you're insistant that it's not an independent paper, then I don't know how to help you, sorry!