I'm surprised no one from Huntington has offered to help you. I live in California but I've done research in Huntington, as my great-grandfather was postmaster there. The only cemetery I saw in the town of Huntington was called Mt. Hope Cemetery. There are other cemeteries in outlying areas. Since your folks were Catholics, it is possible they are buried in a Catholic cemetery. You might contact Sts. Peter & Paul Church to see if there is one in Huntington. You also might check the various cemetery websites, especially the one at Rootsweb.com They also are very helpful in the Indiana History Room at the Huntington Public Library. Good luck.