It is possible that there aren't any records, the genealogy office where the records are held is different from the
History Foundation they are just the internet data base.
They would of collected their information locally from parish registers both RC and Protestant.
I think your next step is gravestone inscriptions. A UK company which has gravestone inscriptions done in 1900 does not list too many graveyards but one is Kilcommon Abbey, St. Peters Athlone (can't tell is this is two or one place the way it is written)
It is a pay website so I can't give you the website on the message board as it is a commercial entity.www.ancestorsatrest.comwww.interment.netwww.igp-web.com
+ Roscommon (look for Archives)
good luck. Annette