Thomas Griffin RC baptism record

Hi everyone. I am searching for a RC baptism record, hopefully that includes Godparents and their names.
Father was Denis Griffin.
Mother was Marg Coffy (sp?)

Baptism took place in December, 1776. My ultimate goal is to find an eventual link to Stephen Griffin. Thomas may have been a cousin. Stephen was married in Howth. His wife's family was from that area and I believe Stephen moved in order to marry her. Assumption is that Stephen was born in the 1770s given the age of his wife and birth of his children. I am unable to find any digital record of baptism for Stephen. This lead me to look outside County Dublin for potential "other" Griffin's.

Thanks all,
Steve