I have bought EBC brake pads in the US for the KTM quads. I would think anywhere that sells them there should be able to source them for you. For the front wheel bearings they aren't too terribly expensive through KTM. Check that they aren't loose inside the hub. If so you'll have to look at replacing the hubs as well, or use a retaining compound for bearings and sleeves when the new bearings are installed. Loctite 660 would be an example of what to use in that situation.