You should be able to buy them from the Toyota Dealer in Italy?? or online
Front pad replacement kit OE Toyota Part #04465‑52210 s/b 4 pads two each side
Rear brake shoes OE Toyota part #04495‑52040 s/b 4 shoes two each side.
If you want aftermarket pads?shoes these part #'s will help too cross reference them
Join this site its free and you can see all Toyota part #'s and microfiche diagrams for Toyota products distributed worldwide. Hope this helps you out
Here you can download all the Toyota OE shop repair manuals for your Scion xB for reference.
Scion Document List