Hello there,
Have you checked out Familysearch.org for your Barry family. There is an entry by a bloke in Thuringowa Qld with a pedigree(family tree) that names christening place of Shannagolden.
There is two others for Patrick with birthplace and several for BERRY and Barry in Ireland that you may want to check out.
I am presuming that you have death certificates of your family members that died in Australia and also Marriage certificates?
If not hunt around family including cousins to see if anyone has them and plead on bended knee for a COPY not the original. If no-one has them then order them to see if there is any other information that might help you.
bye
Suzanne