
If I guessed right - I remember there was some album (?) with Joe Johnston's drawings of the DS surface tiles, he designed the form for the mold IIRC.
http://tiedostot.pilvikaupunki.net/ANH1080p/bscap0132b.png
http://tiedostot.pilvikaupunki.net/ANH1080p/anh0016.png