I will try to help with whatever I can as even though I am not related to your family at all, I am helping my cousin with her father's side of the family and that is his mothers side. I also own the QLD Births, Deaths and marriages on microfiche and that is a large help when trying to find anyone.
So anything I help you with will also help you as well.
Let me know what you have and if you have any certificates at all. my email address is email@example.com