This is DEFINITELY Istvan's Komaromy's work - I guarantee this, as his daughter. Sometimes, the ankles were less 'skinny' - just like us!! It's where he joined on the dancer to the base, which he made separately as its blown, not sculpted.
As far as having a repair done, you could do worse than to contact Bob Martin (The Glass Workshop) who used to work at Pirelli's. Hope this helps.