Perhaps try the Australian Immigration website as they have a list of all the contacts around the world to get your police check done - individual police stations don't do them, there is a central police checking place in the UK (I had to do this to get permanent residency just last year from here).

Actually, I'll give you the link -

http://www.immi.gov.au/allforms/char...cter-penal.pdf

It also tells you what you need to send off to get your police check.

S xx