trying to trace Dianne and Debbie

hi my name is denise and i am trying to trace my 2 half sisters Dianne and Debbie surname possibly Chambers our birth mother was marjorie armstrong jones, we lived in W.A and had grandparents in S.A/ Diannes date of birth is 07/03/1969 Debbies date of birth is 06/04/01971 i havent seen them since 1972 when my sister Donna and i were sent to scotland to live with our paternal grandparents. i know dianne and debbie were almost certainly adopted in south australia i have been trying to tace them for many years, when we were parted they were only very young so probably wont remember us. i would love to hear from them please contact me at daviehigg@aol.com