Trying to Find Obit Information for 1999 Death IN Nambour Queensland Australia and 1988 Death IN Maroochydore Queensland Australia

I am seeking an Obituary or other link to a living descendant of Jean Mary Bromby and/or her sons.
Jean Mary (nee Bromby) died 1999 Nambour, Queensland, Australia
her first husband Robert Dennis Peace died 1988 Maroochydore, Queensland, Australia
her second husband Harold Oysten died 1999 Nambour, Queensland, Australia
her son Robert John Peace born 5 May 1956, died 3 Apr 1988 Maroochydore, Queensland, Australia buried Nambour Gardens beside his brother Michael James Peace. They died together in a fishing accident on the Nambour River. Their brother Martin Leslie Peace died 2013 in Buderim Queensland again obituary information of next of kin being sought, a fourth brother Geoffrey Anthony Peace may still be living in the Sunshine Coast region.
Trying to link up with descendant of these individual. Thanks Pete Scott, Kingston Ontario.