Depending on how much sentimental value the bicycle has for you, how much you're willing to pay, and how long you're willing to wait, there are places that will repair your frame. One reason why steel touring/travel bikes are so popular is that you can often find workshops that can repair them when you're in some random city and in a bind. I got a nasty dent in my top tube on one of my ultralight chromoly steel bikes. While the dent didn't compromise the frame integrity because of its location, it marred an otherwise gorgeous bike. The shop that originally built the bike for me cut the tube out, welded in a new one, and repainted.