Slippery Pete, Airservices isn't responsible for the Mildura AWIS - it belongs to the aerodrome operator. Refer to ESRA:
METEOROLOGICAL INFORMATION PROVIDED
1.TAF CAT B, METAR/SPECI.
2.AWIS PH 03 5023 3879 - Report faults to BoM.
3.AWIS FREQ 128.675 - Report faults to AD OPR.