Searching Kristian Hansen from Risor Norway

Hi I am looking for information regarding my grandfather. I have had no luck finding him in the birth archives of Risor in Norway. The following is all the info I have: Name: Kristian Hansen Born: 22/10/1922 Birthplace : Risor Norway Occupation-. Merchant seaman Date of entry into Australia: April 4 1945 Records indicate he left Australia within 3 months Name of ship: m/V Lidvard Port of debarkation: Melbourne Previously regegistered at Darlinghurst NSW Australia on 5/1/43 Had a form of application for Registration granted on May 7 1945 before leaving. Had information that he may have been also on the Strachan. Any help would be greatly appreciated!!! Sincerely Jayson