Yeah it is fixable....but the real question do you really want to spend over $100 to do it. Moreover, there will be no guarrantee that it won't tear out on your next ski day.....
This has happenned to almost every serious skier, and I after a brief period of mourning, wondering why me why me what did I do to deserve this injustice, I would grab a grinder and grind everything down the damage so that it is smooth and voila, a dedicated rail ski. Enjoy doing your worst to destroy your Dumonts, it won't take long.