I looked at the website www.from-ireland.net
where previously I have been able to find microfilm numbers for the LDS, but coming up a blank today.(I wish they would stop updating their website) My internet connection isn't the best and stops and starts at will.
Don't forget to search for Killucan Parish as they maybe listed under that name.
You can go to www.familysearch.org
and search there, they give you the branches close to where you live. For instance I have two - each 40 miles away, plus a library in the region which specializes in LDS records. If they have the microfilm on record I believe its free and photocopying has a charge but if they haven't got the film they can send for it and I believe there is a charge for that. I've only ever been once myself. You are correct that the National Library in Dublin does not have a complete collection and the LDS filmed some but not all of that.
Have you tried the IGI International Gen....Index
I believe the Church of Ireland records suffered worse than the RC records.Annette
ps I get an automatic notice if anybody posts to this message