Cracked Pinarello Dogma F8 Fork

[smellymcfatfats]

I recently discovered a crack in the steerer tube on my Dogma F8, and was pretty bummed. I wanted to get some PF opinions on what to do next? I realize the bike is four generations old, so sourcing a replacement fork would be challenging I assume? Is carbon repair on a steerer tube worth it, and safe? Is the frameset toast, and should I just go shopping for a 58cm carbon race bike?