As mentioned above, unless you're developing film yourself (or using a really good lab) you can't really push/pull film.
The basic labs just use the default times/chemical temps under the assumption of box speed, and they usually won't do a shorter time to pull your film (they often use automated machines, so to pull or push would mean changing the machine settings, and running your film only... nobody elses)
Shoot it at box speed and use an ND filter if you want wide open.
As for repairs, in Melbourne there is CR Kennedy, who are Pentax Australia, they do repairs and services, but I'm not sure how old they do...
The other option is Shutterbox in Camberwell, who have a terrible website, but thankfully very friendly service.
Shutter Box - home
I haven't needed to have a camera repaired yet, so I can't comment on either's quality of work first hand.