Unfortunately the deaths for anybody between 1980 and 1995 are not available. Deaths are only available up until 1980 and marriages up until 1942.
However if you click on the link below it takes you to the RYERSON INDEX. There are 31 people with the Morphett surname that have died between 1980 and 1995. These are notices placed in newspapers after they have died so hopefully this will give you a start to finding those you are searching for provided they are on the list.
Hoping this helps you out,
Ian Wills ( Melbourne )