Hi everyone!
Glad you've found my kit ;-)
While I'm more than happy to ship them to Aus, I have published all the details of what the kit involves, including code for the ATtiny PIC, etc so you are very welcome to make your own if you'd prefer ;-) I've always been into sharing ideas/designs/code. The PCB design there is designed to use the Arduino Pro Mini, rather than the AtTiny the kit ships with, but the code and principle is the same.
The page with all this info is here :
Project
Hope that's of some interest/help :-)
Regards,
David