Colours available from BMW for E90 (with BMW packaging)
Sparkling graphite/beige interior
Monaco Blue/grey interior
Arctic Metallic/black interior
Titan Silver/black interior
Standard Kyosho edition:
black/red interior
white/black interior
Announced for Kyosho:
blue and green (Don't know what is the interior colour)
You should be able to find the Kyosho versions at diecast stores or eBay.