not sure what sources you've already searched ... would think the place to start is with the parish you located the marriage. This was usually the parish of the bride, so worth checking to see if she was baptized there. Possibly also for the daughter...
Was this a Church of Ireland marriage ?
It seems to be included in Civil records (with the brides surname recorded as Lyndsay), which means it was either registry office or non-Catholic. A civil cert should include occupation for the groom and the fathers, which can sometimes help with earlier searches.