Yes, it looks like Aventurine Silver is available. This list is from over a year ago, but might still be valid:
http://www.m3post.com/forums/showthr...53#post1400553
Estoril Blue is a no-go. An interesting replacement is Monte Carlo Blue, a new color introduced for the X5 M and X6 M (check the press pictures of the X5 M).
Though I doubt BMW allows that color on other cars for some time.
Best regards, south