I'm thinking you may have to order online for the wave disks from OS. As for the K&N filters their website should give you a line on Aussie distributors.
If that doesn't work try contacting Peter Stevens Motorcycles in Victoria. They sell Triumphs, and will know how to get K&N filters
I have the Tuneboy foam filters, but as I want to cut away the bearclaw, I reckon the K&N's would give a better look.
As for the dics there must be someoe out there in NZ or OZ who can do them, Has anyone got them fitted across this planet of ours.