looking for dad

hello I'm looking for my father steve I don't no he last name he use to go to Windsor university in new south wales Australia around the 1979.
I was told by my mum and nan on my mum sie that he had a motorbike accident and died before I was born I'm looking for any informstion on hes last name and hes family if anyone lost a family member from a motorbike accident in 1979 in Sydney Australia please contact me