When I did business finance last year, I had some friends who had done it before me. However, the sample exam they had been given was exactly the same as the one I was given, so I think you'd be hard pressed to actually find any new ones, unless they are really old (and so probably not relevant). Everyone is in the same boat, so you're not disadvantaged at all.
Most of the exam was similar to what was in tutorial questions anyway, so if you're comfortable with them, then you're set. There is usually some difficult question that they would use to test an in depth knowledge of some topic, for instance MM, but there's no way they would include something similar on a practice exam anyway if they plan to use it to separate the cohort haha. I would recommend making sure you understand all of the assumptions in MM, and all of the implications they hold. If you want something to do, construct the theory without one (or more) of the assumptions and see how far you can get. Maybe try thinking of ways to test a wider knowledge in other units, I can't remember what the other topics were haha.
As a heaps up, we were told that the first six weeks or so would only come up in multiple choice... well that was a lie. The first short answer question was on the first half of the course, though it was just knowledge stuff - like what is meant by this principle? etc. No need to apply anything. But if you feel like you need to revise more, maybe have a look over some of that stuff again.
This Finance department is so gay, not only did they give us just ONE exam with NO answers; most of the practice exam are just questions from the tute sheets...
I will probably get downvoted for this, but here goes anyway. I really disagree with this. If you
understand all of the content, then you shouldn't really need any practice exams. What do you plan to do with those 5 practice exams? Use them as a source of 'new' questions? Then fair enough. But I am sure that there are plenty in lectures, tutorials and also the textbook. In business finance from memory, there were a stack of questions in the textbook that you can attempt. So in that respect, there is no need for practice exams.
The real benefit in practice exams, in my opinion, is to get an idea of how to pace yourself in the exam. Perhaps it would be a little better with a couple instead of just one exam, but it should give you an indication of the speed that will be required in the final.
The department aims to produce students who understand content well, not students who just churn through practice exams to memorise how to answer exam questions and get a high mark. I don't think you can really fault them for that. Everyone is on a level playing field, so an abundance (or lack of) exams leaves no one at an advantage.