some time ago I've added some board images for IDE. but those images suitable for web and useless in GUI.
seems fritzing have board images I want — converted from Eagle .brd files, with correct pins as svg objects, with xml descriptions and so on. licensing is also suitable — seems those images is CC-BA.
rfduino also have board image for fritzing. licensing is unknown — https://goddess-gate.com/projects/en/arduino/rfduinofritzing