Generic
Stainless steel milk jug (350ml)
The right size jug is why café milk looks better than yours.
This link opens an Amazon AU search. Check the listing has an Australian plug and warranty before buying.
Also in accessories
Generic · Accessories
54mm tamper (Breville machines)
Breville baskets are 54mm. The plastic tamper in the box is not.
Generic · Accessories
58mm tamper (most other machines)
The standard size for Gaggia, De'Longhi and commercial baskets.