Hello: You can find Dublin City bmd on the website:www.irishgenealogy.ie
I believe its the only on line - free source! Some of the records you can view the actual entry in the parish registers.
I have no relationship to your family in case you were wondering, I just do this for fun its better than TV.
My husband's family were connected to the James family from the Coollattin Estate, Shillelagh & Carnew area.