Death/Cemetery records

I am looking for either Death or Cemetery records for John Alexander Hunter who died around 1768/69 time period, I believe. Four of his sons went to the United States around 1770 after his death. He was married to Ann Owens Hunter and died in Rathmelton. The family was of the Presbyterian faith. I know records are hard to research this far back, hoping that there is a Presbyterian church in the area that may have some records. Or discover a Presbyterian cemetery or a Church of Ireland cemetery that may have sexton records.