TZR 125 Wanted

My niece is coming up to 17 and wants a motorbike (after a year on a 50cc twist "n go, who wouldn’t?).

She would like a TZR as her mum had one at 17, but any geared 2 stroke considered. Come tical ly challenged bikes ok, as long as complete and mechanically ok. I’m happy to travel to find the right bike for her.