I find it extremely impossible that the whole state can't help a sister out
We would if we could. Check up the Legal section of the
rules for AN forums and you'll actually find out that practise SACs are actually school property and copyrighted. To avoid copyright issues and what not, we
cannot supply practise SACs.
I can suggest that you check up old VCAA exams, such as 2002-2005's Exam 2 for Excel-based SACs.
For Core, I would advise any Core modules in practise exams from other places besides VCAA, such as TSFX, TSSM, Heffernan and so forth. I would also recommend Checkpoints, StudyOn and (AN's own) ExamPro books as good resources to test your knowledge, as well as other Further textbooks. An alternative would be to make your own.
Hopefully those resources will keep you going for a while.