Welcome to Ireland Reaching Out!
You did not mention the religious denomination. If they were RC, records for Kiltormer/Laurencetown parish start in 1834 and http://registers.nli.ie/parishes/0335 they are included on Roots Ireland. However, I was not able to locate the marriage record or any baptismal records.
I saw an Elias West on the 1824 Tithe listing for Kiltormer parish but the 1855 Griffiths did not have any West or O'Brien records. We have a parish liaison for Kiltormer parish and I will send him an e-mail alerting him to your message.
Enjoy the rest of your trip.