When looking through the UP website, no friction brakes are shown for the P3D, except the Carbon ceramic ones. Got a Part number?
Is replacement as simple as most cars? Remove calipers, Open BV, push in piston with C-clamp or equivalent close BV, replace pads/spring clips, replace calipers, purge system with mity-vac. Probably put some HP fluid in there too while I am at it.
These aren't the track pads, but here's a link to their "sport" pads.
Unplugged Performance Sport Brake Pad Set for Tesla Model 3