Passenger list for SS Hellig Olav

Based on information from the Digitalarkivet, I think my great-aunt Johanna Johnsdatter was a passenger on the Scandinavia-American line ship Hellig Olav, sailing to New York from Kristiania 19 October 1906. Unfortunately, Ancestry.com seems to have only a fragment of the passenger list for this sailing. Could anyone advise me of other sources for this list. I realize the records may simply no longer exist. Ron Iverson