There are several sources for records in Ireland in the era you are searching, which you are probably aware.
The one I find myself using more often lately is; http://www.rootsireland.ie/
If you have not tried that one already, merely go there and register (free). You can then search their databases without charge. The charge a fee to see the complete record if found, but you can often find a name, date and location by searching their index.
Another is: http://www.immigrantships.net/
Which is an interesting site for many reasons.
I hope one or both of these can be helpful to you.
Good luck and good hunting.