Miz Scarlett I have had similar problems requesting certificates or at least a look up to see if my Parents and/or grandparents married at "certain" Rc churches in NYC and never received an answer to any much less a certificate. I suggest in yur case possibly a letter to the Archdicese of St. Patrick's , I'm not sure of completer address at this moment but a google look up you should be able to find. Or Address it to 50th Street and 5th Ave. NYC. The lady there was very helpful in finding info in regard to death/buriel info on relatives so she should be able to help you with a baptismal. It is possible maybe that that church has records at another area church.