Martin, as far as I can make out, the churches you will need to check are Emly, Nenagh, and Borrisokane, luckily none of them are a million miles apart, I'm sure there must be a Church of Ireland directory to elicit, as to which unions these parish Churches are part of, so many have been closed over the years, others amalgamated, as the Protestant congregation in many rural parts has shrunk, some smaller Churches now only have a service on a monthly basis with the service being rotated, I would advise that you ring the Church of Ireland County Diocesan office ahead of any visit, I wonder if you might know in what Capacity the Carver family were engaged in within the county of Tipperary, be it Military, Rectors, Land owners, or in business re-Commerce.
Ben