Hello bsaputra and welcome,
Sadly there are no businesses in Perth which are prepared to contribute token payment towards CS running costs by purchasing a sponsorship. Its a shame, as theyd get direct access you you by referral. Ho hum...
You will find that eastern state sponsors will be only too happy to assist and freight on a small item like a grinder will not be too expensive. They do it all the time and grinders dont break. You will most likely save $$ as well.
You may possibly find the grinders you have listed in Perth. Best bet is to try the phone book or perhaps you might get a PM with a tip. Go for the Compak if you have the funds.