I found some here:
https://www.google.com/search?q=froz...bimmerpost.com
By the way, the G82 pictures you saw were almost surely Frozen Deep Gray, not Frozen Dark Gray. Although neither are currently in the standard ordering guide in the US, in regions where they are (such as Canada), the former is only available on the G82 (G83 too now presumably) while the latter is only available on the G80.
Of course, one could submit a custom Individual order for either color in either body type, but in regions where they are available for standard orders, it's not likely anyone has (or will) unless they really think the difference in shade is worth the additional charge. In regions like the US where they are not available for standard orders, you have to pay the rate for a custom color, and at that point there are likely other choices commanding somewhat higher interest than these two. But that's not to say they aren't great colors. Quite the opposite - they both look fantastic in pictures.