My name is David Whyte. I'm a Development Officer with Ballythoura Development. After Christmas we will be conducting a survey of historic graveyards in east Limerick including around Croom. The surveys will take place up to early summer next year. All data will end up on the website Historic Graves --> https://historicgraves.com/, but there is already at least one Croom graveyard up there. This is a great resource for anyone researching family history and contains photos of landscapes, graveyards and individual plots. You should keep an eye on this! On the home page you can use the map feature to navigate around Limerick country. At the moment Fedamore won't appear but almost 30 graveyards in Limerick will be added in the coming months. If you have any more questions about the project or want to keep in touch you can contact me on email@example.com.
http://cromadh.com/history-of-croom/ It might also be useful for you to get in touch with the managers of this Croom website as they may be able to put you in touch with a local historian.
All the best