Hi Shelley,
The National Archives in your state may have the records, usually microfilm of cards for each individual. If you live in SA, then your State Archives. Failing that access info as to where you can obtain details of 1900 shpping from the SA Maritime Museum. They have a limited data base from 1850-1889, and are in the process of preparing past that. Try emailing one of the addresses contained on the site: www.history.sa.gov.au/ They are very helpful.
Lorraine Daly.