Only two possibles from family search pilot website:
Anne Cosgrave, Jul - Sep 1921, Enniscorthy registration district, volume 4, page 291
Mary Anne Cosgrave, Apr - Jun 1918, Enniscorthy registration district, volume 4, page 289
Hope this helps. My geography of Ireland is rubbish so no way of knowing how close they might be to what you're looking for.
Andy