LF Tony stranded in Siberia
So I am looking for a Post-Civil War fic where Tony is stranded in Siberia and no one knows where he is. The suite is beyond repair, the only clothes he has is the skin-tight flight suite which doesn't protect him from the cold. To save himself he realizes that he has to transfuse the frozen blood of the dead Winter Soliders into himself, so that he can survive going into one of the cyro chambers until help arrives.
I know it was on AO3 at one time but I haven't been able to find it again.