- Casselt
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- Noble Heroic Member
You can still buy codes for the legendary flames (Red) on Amazon and Ebay. The codes have not expired (I don't believe they ever will).
Eternal flames (Blue) were only available for a limited time during the management change of Halo from Bungie to 343 Industries. They were available from June 23rd, 2011 - July 7th, 2011. Sorry bro, but you are out of luck with the eternal flames.