Pelican sells a variety for the 930 calipers (including genuine Porsche).
Porsche 911 & Carrera Brake Pads & Rotors - Page 1
If you want to get them semi-locally to you, Zims is a good source, too.
Home | Zim's Autotechnik
Autozone "might" have some (you can check their website), but they will be cheap, aftermarket copies.