Looks like the damage extends far back enough to wreck the torsion bar and everything. If the bulkhead isn't junk, you might compair the angles of the left and right ski spindles from the side and front to determine if the A-arm assemblies are salvageable. In answer to the question of fixing or replacing, I think it would be a headache getting the alignment perfect and the sled would never quite be the same unless you replaced everything. But if you decide to attempt it, more power to you!
2012 Arctic Cat XF 800 Sno Pro
2011 Polaris Rush 800 Pro-R