Hi john
We have a few OZSTOC members in WA who are serving police officers, some still ride on the job, whilst others have ridden.
I'm unsure of whether the police would run an advance course like they did in the UK ( I'm a pom too)
If you google it you will see that the RAC in Perth along with other private companies do an advanced rider course, I am trying to organise an advanced rider day for a few of the guys as a few of us do some local marshalling work and a advanced rider course would be beneficial.
Have you bought a bike yet or still looking, there are a few ST11's on gumtree, but you'll be pushed to get an ST13 for that money, even at the auctions, ex police usually go for $4500+ and then you have to add the ubiquitous 12% auction charges on top then state tax.