A sad sight..

Was the top section tapered? If not, perhaps you can find a fitting tube cheaply with a rigger, or even during the fall clearouts around boatyards and harbours? It dont look like a rotating setup?

Looks like you had four adults on her in a fresh breeze when the mast broke. I assume you have tought a bit on why the rig snapped.. Can it have been a case of overloading the section, or did a stay or something give way?
What kind of sailare did she have? It looks immense!